{"title":"Yanmar 30HP 4-Stroke Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"max-width: 920px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003cp\u003eThis page is tailored for Yanmar 4‑Stroke 30HP outboard engines. Use it to find compatible parts and practical service information, including maintenance tips, commonly replaced items, and troubleshooting guidance. You can also browse the main Yanmar collection. Scroll to the bottom of this page to start browsing parts for this engine. On the collection page, use the “Filter \u0026amp; Sort” controls to narrow results by horsepower, year range, and part category\/section.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar\" style=\"display:inline-block; padding:10px 16px; background:#0b4; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Yanmar Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"max-width: 920px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 30HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate\/serial tag: Typically on the starboard transom bracket or swivel bracket. Record the full model code and serial number.\u003c\/li\u003e\n    \u003cli\u003eReading the code: Letters and suffixes often indicate shaft length (S=15\", L=20\"), control type (tiller vs. remote), and starting method (manual vs. electric). Year or revision may be encoded by a trailing letter.\u003c\/li\u003e\n    \u003cli\u003e4‑Stroke identifiers: Look for an oil fill cap and dipstick under the cowl. Do not confuse with older 2‑stroke models that use an oil injection tank.\u003c\/li\u003e\n    \u003cli\u003ePlatform cues: Later 4‑stroke 30HP models may use EFI, while earlier versions may be carbureted. Cowl decals and the presence of an ECU, injectors, or a choke\/enrichment lever can help you tell which you have.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"max-width: 920px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n  \u003ch3\u003eInline‑3 30HP 4‑Stroke (Carbureted)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInline‑3, SOHC 4‑stroke with carburetors; conventional CD ignition\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eTypical 30HP 4‑stroke outboards in 15\" (S) and 20\" (L) shaft lengths\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eSimple fuel system, easy to service, good reliability\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCarb kits, gaskets, and ignition parts may be model‑specific; cooling and gearcase parts often overlap across years—verify by model code\/serial.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003ch3\u003eInline‑3 30HP 4‑Stroke (EFI)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInline‑3, SOHC 4‑stroke with electronic fuel injection; ECU‑controlled\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e30HP EFI outboards offered in short\/long shaft variants with remote or tiller controls\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eImproved fuel economy, smoother idle, easier cold starts\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eFuel and intake components (injectors, high‑pressure filter) are platform‑specific; cooling and anode parts typically align by model family—confirm via serial.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"max-width: 920px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for 4‑stroke outboards. Always follow the official service manual for your exact model and use conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eFirst 20 hours, then every 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eUse marine 4‑stroke oil grade specified by the manual; replace crush washer as required\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-oil-filters\"\u003eYanmar Oil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect for water intrusion (milky oil) and metal shavings; replace seals if needed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/lower-unit-seal-kits\"\u003eLower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect every 100 hours; replace as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCheck gap and insulator color; replace as a set for consistent performance\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eFuel filter \/ water separator\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eEvery 100 hours or sooner with contaminated fuel\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eDrain or replace when water\/debris is visible; EFI models may have additional fine filters\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-fuel-filters\"\u003eYanmar Fuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eWater pump impeller\/kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eEvery 200 hours or 2 seasons (annually in sandy\/silty water)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eRestore cooling system performance and protect against overheat\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/water-pump-impeller-rebuild-kits\"\u003eWater Pump Impeller Rebuild Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eAnodes (zinc\/aluminum\/magnesium)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect monthly; replace when ~50% consumed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eMatch alloy to water type (salt\/brackish\/fresh) to prevent galvanic corrosion\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eThermostat + gasket\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect annually; replace if overheating or running cold\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eMaintain proper operating temperature and fuel economy\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-gaskets\"\u003eYanmar Gaskets\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eAir filter \/ intake screen (if equipped)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect every 100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eClean\/replace to prevent rich running and starting issues\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-air-filters\"\u003eYanmar Air Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"max-width: 920px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service – \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-service-maintenance-kits\"\u003eYanmar Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System – \u003ca href=\"https:\/\/seasierra.com\/collections\/water-pump-impeller-rebuild-kits\"\u003eWater Pump Impeller Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System – \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-fuel-filters\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical – \u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGaskets \u0026amp; Seals – \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-gaskets\"\u003eYanmar Gaskets\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection – \u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eExhaust \/ Elbows – \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-elbows\"\u003eYanmar Elbows\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"max-width: 920px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eWeak tell‑tale or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect intake screen, tell‑tale hose, thermostat; verify impeller condition\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eWater pump impeller kit, thermostat, gaskets, intake screen\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003ePrime fuel system, check for stale fuel, inspect plugs; clean idle circuits or verify EFI sensors\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eFuel filter, spark plugs, hoses, air filter\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect prop for damage\/fouling, test compression, verify timing and fuel supply\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eFuel filters, spark plugs, air filter, propeller\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCheck oil level\/condition; look for water intrusion; inspect seals and bearings\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eLower unit seal kit, bearings, drain\/fill seals\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eExcessive vibration at mid‑range\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCheck prop balance, hub condition, and engine mounts\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003ePropeller, bushings, washers\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"max-width: 920px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eMany cooling and gearcase components carry across multiple years, but fuel\/ignition parts, gaskets, and brackets can be platform‑specific. Always confirm with your exact model code and serial number before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should the impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule of thumb, replace the impeller every 200 hours or every 1–2 seasons—annually if you run in sandy\/silty water or notice a weak tell‑tale stream.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eChange lower unit gear oil every 100 hours or annually. If oil appears milky or you see water\/metal, service seals and inspect internal components.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide brand, full model code, serial number, horsepower, shaft length, and any visible part numbers. Clear photos of the nameplate and the part to be replaced are very helpful.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"max-width: 920px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year, and model? Browse the main Yanmar collection and refine results to match your 30HP outboard.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar\" style=\"display:inline-block; padding:10px 16px; background:#0b4; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Yanmar Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; color:#333;\"\u003eIf you’re unsure about your model, send us a clear photo of the nameplate and the part you need—we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"engine-cooling-pump-fits-yanmar-2gmf-3gmf-2ym-3ym-replaces-128397-42500","title":"Engine Cooling Pump – Fits Yanmar 2GMF, 3GMF, 2YM, 3YM (Replaces 128397-42500)","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket \u003cstrong\u003eEngine Cooling Pump – Fits Yanmar 2GMF, 3GMF, 2YM, 3YM (Replaces 128397-42500)\u003c\/strong\u003e is designed for a range of Yanmar marine diesel engines, including the 2GMF, 3GMF, 2YM, and 3YM series. It is compatible with various model years, including European-built YEU models from 1996–2004.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct replacement for Yanmar part numbers 128397-42500 and 128990-42500, and interchanges with Johnson pump models 10-24509-01, 10-13337-01, and F4B-903.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eEngine-mounted bracket installation for secure fitting.\u003c\/li\u003e\n    \u003cli\u003eDurable bronze housing offers superior corrosion resistance in marine environments.\u003c\/li\u003e\n    \u003cli\u003eIncludes the essential steel pulley with washer and nut for a complete installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e128397-42500\u003c\/td\u003e\n        \u003ctd\u003ePrimary OEM reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e128990-42500\u003c\/td\u003e\n        \u003ctd\u003eSuperseded part number\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\u003c\/td\u003e\n        \u003ctd\u003e10-24509-01\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\u003c\/td\u003e\n        \u003ctd\u003e10-13337-01\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eJohnson\u003c\/td\u003e\n        \u003ctd\u003eF4B-903\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eFor Yanmar YEU series, this pump fits European-built models with serial numbers starting with 'E'.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GMF\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128397-42500\u003c\/td\u003e\n        \u003ctd\u003eRaw water engine cooling pump\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GMF\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128397-42500\u003c\/td\u003e\n        \u003ctd\u003eRaw water engine cooling pump\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM20F-YEU\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e1996–2004\u003c\/td\u003e\n        \u003ctd\u003e128397-42500\u003c\/td\u003e\n        \u003ctd\u003eEuropean-built models (Serial number starts with 'E')\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM30F-YEU\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e1996–2004\u003c\/td\u003e\n        \u003ctd\u003e128397-42500\u003c\/td\u003e\n        \u003ctd\u003eEuropean-built models (Serial number starts with 'E')\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2YM15\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003eEarly models\u003c\/td\u003e\n        \u003ctd\u003e128397-42500\u003c\/td\u003e\n        \u003ctd\u003eIndirect cooled engines\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3YM20\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003eEarly models\u003c\/td\u003e\n        \u003ctd\u003e128397-42500\u003c\/td\u003e\n        \u003ctd\u003eIndirect cooled engines\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3YM30\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003eEarly models\u003c\/td\u003e\n        \u003ctd\u003e128397-42500\u003c\/td\u003e\n        \u003ctd\u003eIndirect cooled engines\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eRaw Water \/ Seawater Engine Cooling Pump\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eEngine-mounted with bracket\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003e3\/8 inch hose ports (inlet and outlet)\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eBronze\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBronze\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e19.0\" x 16.0\" x 14.5\" (L x W x H)\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e1.82 kg (4.0 lbs)\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eHose connection\u003c\/dd\u003e\n  \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e1 Year Manufacturer's Warranty\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eBronze construction, Neoprene impeller, Heavy duty marine grade casting, 3X series non-magnetic marine grade shaft, Long life mechanical seal, O-Ring seals on end covers\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Engine Cooling Pump Assembly (128397-42500)\u003c\/li\u003e\n  \u003cli\u003e1 x Mounting Bracket\u003c\/li\u003e\n  \u003cli\u003e1 x Steel Pulley (\u003cspan style=\"color:#d0021b;\"\u003eWasher \u0026amp; Nut included\u003c\/span\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eEnsure the engine is completely cool and disconnect the battery.\u003c\/li\u003e\n  \u003cli\u003eClose the raw water seacock to prevent water from entering the vessel.\u003c\/li\u003e\n  \u003cli\u003ePlace a catch pan under the existing pump to manage spills.\u003c\/li\u003e\n  \u003cli\u003eLoosen the belt and remove it from the pump pulley.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the inlet and outlet hoses from the old pump. Note their orientation.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and remove the old pump assembly from the engine bracket.\u003c\/li\u003e\n  \u003cli\u003eClean the mounting surface to ensure a proper seal.\u003c\/li\u003e\n  \u003cli\u003eMount the new pump assembly and tighten the bolts to the engine manufacturer's torque specifications.\u003c\/li\u003e\n  \u003cli\u003eReconnect the hoses and secure them with appropriate marine-grade clamps.\u003c\/li\u003e\n  \u003cli\u003eReinstall and tension the belt according to your engine's service manual.\u003c\/li\u003e\n  \u003cli\u003eOpen the seacock and reconnect the battery.\u003c\/li\u003e\n  \u003cli\u003eStart the engine and immediately inspect for any water leaks at the pump body and hose connections.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I confirm this pump fits my engine?\u003c\/summary\u003e\u003cp\u003eThis pump is designed for Yanmar 2GMF, 3GMF, 2YM, and 3YM series engines. For 2GM20F-YEU and 3GM30F-YEU models (1996–2004), confirm your engine serial number begins with an 'E'. The most reliable method is to cross-reference your existing part number with those listed in our Part Number Matrix.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the signs my current pump is failing?\u003c\/summary\u003e\u003cp\u003eCommon signs of a failing raw water pump include the engine overheating, visible water leaks from the pump body or seals, a noticeably reduced flow of water from the exhaust outlet, or unusual grinding\/whining noises coming from the pump during operation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I just replace the impeller instead of the whole pump?\u003c\/summary\u003e\u003cp\u003eYes, the neoprene impeller is a standard service item. However, if the pump housing is scored, the shaft is worn, or the seals are leaking, replacing the entire pump assembly is the most reliable solution to prevent recurring issues and ensure long-term performance.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the difference between this pump and the original Yanmar part?\u003c\/summary\u003e\u003cp\u003eThis is a high-quality aftermarket pump engineered to meet or exceed OEM specifications. It features a heavy-duty bronze casting, a non-magnetic marine-grade shaft, and a long-life mechanical seal for durability, offering a cost-effective and reliable alternative to the original component.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat maintenance does this pump require?\u003c\/summary\u003e\u003cp\u003eIt is best practice to inspect the impeller for cracks, stiffness, or wear at least once a year, typically during winterization or pre-season commissioning. Also, periodically check for any leaks around the seals and ensure hose connections remain tight and free of corrosion.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow can I tell if my Yanmar has a \"YEU\" European model?\u003c\/summary\u003e\u003cp\u003eYanmar engines built in the European Union (YEU) are identified by a serial number that starts with the letter 'E'. This pump is confirmed to fit those specific models from 1996–2004.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50587181973819,"sku":"22FIP002","price":175.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/128397-42500_6bc9717b-d4a0-456b-aa83-bc57bc761405.jpg?v=1757934070"},{"product_id":"piston-ring-set-fits-yanmar-1gm10-2gm20-3gm30-marine-engines-replaces-721575-22500","title":"Piston Ring Set – Fits Yanmar 1GM10, 2GM20, 3GM30 Marine Engines (Replaces 721575-22500)","description":"\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket \u003cstrong\u003ePiston Ring Set\u003c\/strong\u003e provides a complete solution for servicing single pistons in Yanmar Marine Diesel Engines, including the 1GM10, 2GM20, and 3GM30 series (8–30 HP, 4-Stroke) from 1982 and later. Designed to meet OEM specifications, this set ensures reliable compression and oil control for restored engine performance.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct replacement for Yanmar part numbers 721575-22500 and the older, superseded part number 705311-22500.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIncludes a complete ring set for one piston: one compression, one wiper, and one oil control ring.\u003c\/li\u003e\n\u003cli\u003eDesigned for a standard (STD) 75 mm cylinder bore.\u003c\/li\u003e\n\u003cli\u003eEngineered for internal installation in compatible marine diesel engines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Cross-Reference\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eSuperseded By\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e705311-22500\u003c\/td\u003e\n        \u003ctd\u003e721575-22500\u003c\/td\u003e\n        \u003ctd\u003eOlder part number\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eThis component is compatible with the following Yanmar marine diesel engines.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e1GM10\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003eReplaces 705311-22500\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e1GM10-YMI\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e1GM10C\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e1GM10L\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e1GM10VE\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003eReplaces 705311-22500\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20-YEU\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20B\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20C\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20C-YEU\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20F\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20F-YEU\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20FC-YEU\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20FVE\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20VE\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GMLP\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GMLP-C\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003eReplaces 705311-22500\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30-YEU\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30B\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30C\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30C-YEU\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30F\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30F-YEU\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30FC-YEU\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30FVE\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30VE\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3HM\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3HMF\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1982 and later\u003c\/td\u003e\n\u003ctd\u003e721575-22500\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003ePiston Ring Set\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eEngine Internal Component\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eDiesel\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eSteel\/Cast Iron\u003c\/dd\u003e\n  \u003cdt\u003eBore Diameter\u003c\/dt\u003e\n\u003cdd\u003e75 mm\u003c\/dd\u003e\n  \u003cdt\u003eRing Size\u003c\/dt\u003e\n\u003cdd\u003eStandard (STD)\u003c\/dd\u003e\n  \u003cdt\u003eProduct Dimensions\u003c\/dt\u003e\n\u003cdd\u003e18.0\" L x 14.5\" W x 1.0\" H\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Compression Ring\u003c\/li\u003e\n  \u003cli\u003e1 x Wiper Ring\u003c\/li\u003e\n  \u003cli\u003e1 x Oil Control Ring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eEnsure the engine is off, cool, and disconnected from its power source before starting.\u003c\/li\u003e\n  \u003cli\u003eDrain the engine oil and coolant completely.\u003c\/li\u003e\n  \u003cli\u003eDisassemble the engine to access the pistons, which typically requires removing the cylinder head and oil pan.\u003c\/li\u003e\n  \u003cli\u003eCarefully remove the old piston rings using a dedicated ring expander tool to prevent scoring the piston.\u003c\/li\u003e\n  \u003cli\u003eThoroughly clean the piston ring grooves to remove all carbon buildup and residue.\u003c\/li\u003e\n  \u003cli\u003eInstall the new rings in the correct order (oil control, wiper, then compression) and orientation as per the engine's service manual.\u003c\/li\u003e\n  \u003cli\u003eUse a ring expander tool for installation to avoid distorting the rings.\u003c\/li\u003e\n  \u003cli\u003eStagger the ring end gaps according to the manufacturer's specifications to ensure a proper seal.\u003c\/li\u003e\n  \u003cli\u003eGenerously lubricate the new rings, piston, and cylinder wall with fresh engine oil.\u003c\/li\u003e\n  \u003cli\u003eReassemble the engine, tightening all fasteners to the specified torque values.\u003c\/li\u003e\n  \u003cli\u003eRefill the engine with the correct grade of oil and coolant.\u003c\/li\u003e\n  \u003cli\u003eStart the engine and check carefully for any leaks, unusual noises, or performance issues.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if this ring set fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eThis set is specifically for a 75 mm standard bore size. Check your engine model against our compatibility table and verify the required bore size in your engine's service manual. It is designed for Yanmar models like the 1GM10, 2GM20, and 3GM30 series.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of failing piston rings?\u003c\/summary\u003e\n  \u003cp\u003eCommon symptoms include excessive blue or white smoke from the exhaust, abnormally high oil consumption, noticeable loss of engine power, and poor results from a cylinder compression test.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this a standard size (STD) ring set?\u003c\/summary\u003e\n  \u003cp\u003eYes, this is a standard (STD) size piston ring set for a 75 mm cylinder bore. It is not an oversized set intended for cylinders that have been bored out.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I reuse my old piston rings during a rebuild?\u003c\/summary\u003e\n  \u003cp\u003eNo. Piston rings wear down and lose their elastic properties with use. They are considered a single-use component and must be replaced with a new set during any piston service or engine overhaul to ensure proper function.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should piston rings be replaced?\u003c\/summary\u003e\n  \u003cp\u003eThere is no fixed service interval for piston rings. They are replaced as needed during a major engine overhaul, which is typically indicated by high engine hours, significant performance loss, or specific symptoms of ring failure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50587182727483,"sku":"721575-22500","price":52.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/721575-22500_8ee090ca-3df0-4097-9e03-928bd511c1bd.jpg?v=1757934116"},{"product_id":"air-filter-fits-yanmar-1gm-series-marine-diesel-engines-replaces-128170-12540","title":"Air Filter – Fits Yanmar 1GM Series Marine Diesel Engines (Replaces 128170-12540)","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis high-quality \u003cstrong\u003eair filter is designed for Yanmar 1GM series marine diesel engines\u003c\/strong\u003e, ensuring optimal engine performance and protection against airborne contaminants. It is engineered to fit various 1GM models, providing a reliable seal and efficient filtration.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct interchange for Yanmar part numbers 128170-12540 and 128171-12540.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInstalls directly into the factory air housing with no modifications required.\u003c\/li\u003e\n  \u003cli\u003eDesigned specifically for use in marine diesel engine environments.\u003c\/li\u003e\n  \u003cli\u003eEngineered with precise dimensions for an exact fit and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e128170-12540\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e128171-12540\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eThis air filter is known to fit a variety of Yanmar 1GM series engines. Please review the table to ensure it matches your specific application.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e1GM\u003c\/td\u003e\n        \u003ctd\u003e10-30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128170-12540\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e1GM10\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128170-12540\u003c\/td\u003e\n        \u003ctd\u003eAlso fits 1GM10L\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e1GM10C\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128170-12540\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e1GM10VE\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128170-12540\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e1GM-26M20\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128170-12540\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n            \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e1GM-20F\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128170-12540\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e1GM-36M30\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128170-12540\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e1GM-30F\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128170-12540\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eAir Filter Element\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect Replacement\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eDiesel\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eDirect-fit\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eHeight: 1.5; Width: 11.0; Length: 18.0;\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e0.1 kg (0.22 lb)\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eDirect-fit\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Air Filter Element (Replaces 128170-12540)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eLocate and open the engine's air filter housing. This is typically held in place by clips or wing nuts.\u003c\/li\u003e\n  \u003cli\u003eRemove the old filter element and dispose of it properly.\u003c\/li\u003e\n  \u003cli\u003eClean any dust or debris from the inside of the housing with a clean, dry cloth.\u003c\/li\u003e\n  \u003cli\u003ePlace the new air filter into the housing, ensuring it is seated correctly and forms a tight seal.\u003c\/li\u003e\n  \u003cli\u003eSecurely fasten the housing cover.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I know if this air filter fits my Yanmar engine?\u003c\/summary\u003e\u003cp\u003eThis filter is designed for the Yanmar 1GM series. To ensure compatibility, please check your engine's model number against the list in the \"Engine \u0026amp; Model Compatibility\" section. Also, verify that your existing part number is an equivalent to 128170-12540 or 128171-12540.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the signs my air filter needs to be replaced?\u003c\/summary\u003e\u003cp\u003eCommon symptoms of a clogged air filter include a noticeable loss of engine power, increased black smoke from the exhaust, and higher-than-normal fuel consumption. Visually inspecting the filter for excessive dirt is the most direct method.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should I replace this filter?\u003c\/summary\u003e\u003cp\u003eFor optimal performance, we recommend inspecting the air filter every 100-200 engine hours. Replace it at least once a year or more frequently if operating in dusty, salty, or debris-heavy environments.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003ePro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003eFast Global Fulfillment — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003eManufacturer-Direct Value — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50626121859387,"sku":"128170-12540","price":29.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/128170-12540_318f6da3-17b4-451a-9ee0-a52d60c221b8.jpg?v=1759816254"},{"product_id":"axial-bearing-fits-yanmar-3ym-series-marine-engines-replaces-119717-02930","title":"Axial Bearing – Fits Yanmar 3YM Series Marine Engines (Replaces 119717-02930)","description":"\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis \u003cstrong\u003eAxial Bearing – Fits Yanmar 3YM Series Marine Engines (Replaces 119717-02930)\u003c\/strong\u003e is a crucial internal component designed for Yanmar 3YM20, 3YM27A, 3YM30, and 3YM30AE marine diesel engines. It ensures proper crankshaft alignment and function within the cylinder block assembly.\u003c\/p\u003e\n  \u003cp\u003eThis part serves as a direct replacement for Yanmar OEM part number 119717-02930.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eProduct Type: Axial Bearing (Thrust Bearing)\u003c\/li\u003e\n    \u003cli\u003eInstallation: Internal Engine Component\u003c\/li\u003e\n    \u003cli\u003eLocation: Located in cylinder block assembly\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e119717-02930\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n  \u003cp\u003eThis axial bearing is designed for specific Yanmar 3YM series engines.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel\u003c\/th\u003e\n          \u003cth\u003eRated HP\u003c\/th\u003e\n          \u003cth\u003eStroke\u003c\/th\u003e\n          \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3YM20\u003c\/td\u003e\n          \u003ctd\u003e20\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e119717-02930\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3YM27A\u003c\/td\u003e\n          \u003ctd\u003e27\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e119717-02930\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3YM30\u003c\/td\u003e\n          \u003ctd\u003e30\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e119717-02930\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3YM30AE\u003c\/td\u003e\n          \u003ctd\u003e30\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e119717-02930\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eAxial Bearing (Thrust Bearing)\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eInternal Engine Component\u003c\/dd\u003e\n    \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eDiesel\u003c\/dd\u003e\n    \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e6.5\" L x 6.5\" W x 0.5\" H\u003c\/dd\u003e\n    \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eLocated in cylinder block assembly\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x AXIAL BEARING (119717-02930)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eEnsure the engine is off, cool, and disconnected from the power source before starting work.\u003c\/li\u003e\n    \u003cli\u003eDrain the engine oil and coolant completely.\u003c\/li\u003e\n    \u003cli\u003eConsult your engine's official service manual to identify the correct procedure for accessing internal components.\u003c\/li\u003e\n    \u003cli\u003eDisassemble the necessary parts of the engine to reach the cylinder block and crankshaft area.\u003c\/li\u003e\n    \u003cli\u003eCarefully remove the old axial bearing, paying close attention to its orientation.\u003c\/li\u003e\n    \u003cli\u003eThoroughly clean the mounting surface and adjacent areas of any dirt, oil, or old gasket material.\u003c\/li\u003e\n    \u003cli\u003eLiberally apply fresh, clean engine oil to the new axial bearing before installation.\u003c\/li\u003e\n    \u003cli\u003eInstall the new bearing, ensuring it is correctly seated and aligned as per the service manual.\u003c\/li\u003e\n    \u003cli\u003eReassemble all engine components in the reverse order of disassembly, torquing all bolts to the manufacturer’s specified values.\u003c\/li\u003e\n    \u003cli\u003eRefill the engine with the correct type and amount of oil and coolant.\u003c\/li\u003e\n    \u003cli\u003eAfter reconnecting power, check for leaks and test the engine's operation in a safe manner.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\u003csummary\u003eHow do I know if my axial bearing needs replacement?\u003c\/summary\u003e\u003cp\u003eSigns of a failing axial bearing include excessive crankshaft end play (fore-and-aft movement), engine knocking or rumbling sounds, or the presence of bronze-colored flakes in the engine oil during a change. Diagnosis should be confirmed by a qualified mechanic following the procedures in your engine's service manual.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat is the function of this bearing?\u003c\/summary\u003e\u003cp\u003eThe axial bearing, or thrust bearing, manages the axial (forward and backward) thrust of the crankshaft. It prevents excessive movement, which is critical for maintaining engine timing and preventing damage to internal components.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eDoes this part require lubrication during installation?\u003c\/summary\u003e\u003cp\u003eYes, this is absolutely essential. The new axial bearing must be thoroughly lubricated with clean engine oil before and during installation to ensure proper function and prevent immediate failure.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eIs this an aftermarket or OEM part?\u003c\/summary\u003e\u003cp\u003eThis listing is for a high-quality aftermarket replacement part, not an original equipment manufacturer (OEM) component. It is engineered to meet or exceed OEM specifications and is produced in an ISO 9002 certified facility to ensure quality and performance.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat are your shipping speeds and costs?\u003c\/summary\u003e\u003cp\u003eWe offer fast worldwide shipping, with most orders arriving within 5–15 days. Standard shipping is free. If expedited shipping is available for your location, the options and costs will be displayed at checkout.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat is the warranty and return policy?\u003c\/summary\u003e\u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal marine use. Should you encounter an issue, please contact our support team with your order number. Returns of unused parts in their original packaging are accepted within our standard return period; please see our full policy page or contact us for details.\u003c\/p\u003e\u003c\/details\u003e\n\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50626122023227,"sku":"119717-02930","price":99.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/119717-02930_8ed5ccdb-1cfe-4f48-8a08-02b475b23b1a.jpg?v=1759816258"},{"product_id":"yanmar-crankshaft-bearing-fits-yanmar-3ym-series-marine-engines-replaces-719717-02901","title":"Yanmar Crankshaft Bearing – Fits Yanmar 3YM Series Marine Engines (Replaces 719717-02901)","description":"\u003cstyle\u003e\n\/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n.ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\/* Base table styles *\/\ntable.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\ntable.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n\/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\ntable.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n\/* Small screen optimization *\/\n@media (max-width:480px){\n  table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n}\n\u003c\/style\u003e\n\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis RECMAR \u003cstrong\u003eYanmar Crankshaft Bearing\u003c\/strong\u003e is a direct replacement for Yanmar 3YM series marine diesel engines. It is engineered to fit models including the 3YM20, 3YM27A, 3YM30, and 3YM30AE, ensuring reliable performance and compatibility.\u003c\/p\u003e\n\u003cp\u003eThis component is a direct interchange for Yanmar part number 719717-02901 and RECMAR part REC719717-02901.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for durability and precision to support consistent engine performance.\u003c\/li\u003e\n\u003cli\u003eReduces internal friction for optimal operation.\u003c\/li\u003e\n\u003cli\u003eInstallation is internal to the engine block.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e719717-02901\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eRECMAR\u003c\/td\u003e\n        \u003ctd\u003eREC719717-02901\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3YM20\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e719717-02901\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3YM27A\u003c\/td\u003e\n        \u003ctd\u003e27\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e719717-02901\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3YM30\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e719717-02901\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3YM30AE\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e719717-02901\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eCrankshaft Bearing\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eEngine Internal\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eDiesel\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eHeight: 7.0 cm, Width: 5.0 cm, Length: 7.0 cm\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e0.02 kg (0.044 lb)\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eDesigned for durability and precision; reduces internal friction and supports consistent performance\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Crankshaft Bearing (719717-02901)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eInstallation of this crankshaft bearing is a complex task that requires engine disassembly and specialized tools. It should be performed by a qualified marine mechanic following the procedures in the official Yanmar service manual. Ensure all parts are meticulously cleaned and correctly lubricated to prevent premature wear and engine failure.\u003c\/p\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if this crankshaft bearing will fit my engine?\u003c\/summary\u003e\n  \u003cp\u003eThis bearing is designed for Yanmar 3YM series engines. Please verify your specific model (3YM20, 3YM27A, 3YM30, 3YM30AE) and cross-reference the OEM part number 719717-02901 in your service manual or by inspecting your current part.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are common signs of a failing crankshaft bearing?\u003c\/summary\u003e\n  \u003cp\u003eSymptoms of a worn crankshaft bearing include a persistent knocking or rumbling sound from the engine, low oil pressure readings, and the presence of metallic particles in the engine oil during an oil change.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I replace just one bearing?\u003c\/summary\u003e\n  \u003cp\u003eWhile it is sometimes possible, it is highly recommended to replace all main and connecting rod bearings at the same time during an engine rebuild. This ensures consistent clearances and prolongs engine life.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n\u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50626122776891,"sku":"719717-02901","price":99.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/719717-02901_fcef68c2-ae36-4288-8c16-d50eca63160b.jpg?v=1759816286"},{"product_id":"breather-cover-gasket-fits-yanmar-2gm-2gm20-3gm30f-series-replaces-121000-03071","title":"Breather Cover Gasket – Fits Yanmar 2GM, 2GM20, 3GM30F Series (Replaces 121000-03071)","description":"\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis high-quality \u003cstrong\u003eBreather Cover Gasket\u003c\/strong\u003e ensures a perfect seal for the engine breather system on various Yanmar marine diesel engines. It is designed to fit 2-cylinder GM series engines (including 2GML, 2GLMP, 2GM20, 2GM20F) and 3-cylinder 3GM30F series, primarily used in applications from the 1980s and 1990s.\u003c\/p\u003e\n  \u003cp\u003eThis part serves as a direct replacement for Yanmar OEM part number 121000-03071, ensuring reliable performance and compatibility.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003ePrevents oil leakage by sealing the breather cover assembly.\u003c\/li\u003e\n    \u003cli\u003eDesigned for use in diesel marine engine environments.\u003c\/li\u003e\n    \u003cli\u003eInstalls directly into the engine's breather system.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e121000-03071\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n  \u003cp\u003eThis gasket is compatible with the following Yanmar Marine diesel engines.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel\u003c\/th\u003e\n          \u003cth\u003eRated HP\u003c\/th\u003e\n          \u003cth\u003eStroke\u003c\/th\u003e\n          \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e2GML\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e121000-03071\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e2GLMP\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e121000-03071\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e2GM20\u003c\/td\u003e\n          \u003ctd\u003e20\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e121000-03071\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e2GM20F\u003c\/td\u003e\n          \u003ctd\u003e20\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e121000-03071\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e2GM20F-YEU\u003c\/td\u003e\n          \u003ctd\u003e20\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e121000-03071\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e2GM20-YEU\u003c\/td\u003e\n          \u003ctd\u003e20\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e121000-03071\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e2GMLP\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e121000-03071\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3GM30F\u003c\/td\u003e\n          \u003ctd\u003e30\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e121000-03071\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3GM30F-YEU\u003c\/td\u003e\n          \u003ctd\u003e30\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e121000-03071\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eBreather Cover Gasket\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eEngine Breather System\u003c\/dd\u003e\n    \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eDiesel\u003c\/dd\u003e\n    \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003ePaper\/Composite\u003c\/dd\u003e\n    \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e6.5 cm × 4.5 cm × 0.2 cm (W × L × H)\u003c\/dd\u003e\n    \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003eApproximately 0.01 kg\u003c\/dd\u003e\n    \u003cdt\u003eFunction\u003c\/dt\u003e\n\u003cdd\u003eSeals the breather cover assembly to prevent oil leakage.\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 ×\u003c\/span\u003e Breather Cover Gasket (Replaces 121000-03071)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eEnsure the engine is off and cool. Disconnect the battery for safety.\u003c\/li\u003e\n    \u003cli\u003eRemove the old breather cover and gasket. Note the orientation and position of all components.\u003c\/li\u003e\n    \u003cli\u003eThoroughly clean both mating surfaces on the engine block and the breather cover. Remove all old gasket material and residue.\u003c\/li\u003e\n    \u003cli\u003eAlign the new gasket onto the engine block. Ensure all bolt holes line up correctly.\u003c\/li\u003e\n    \u003cli\u003eCarefully place the breather cover over the new gasket.\u003c\/li\u003e\n    \u003cli\u003eHand-tighten the bolts in an alternating pattern to seat the cover evenly.\u003c\/li\u003e\n    \u003cli\u003eTorque the bolts to the manufacturer's specified values using a torque wrench. Do not overtighten.\u003c\/li\u003e\n    \u003cli\u003eReconnect the battery, start the engine, and check for any oil leaks around the breather cover.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if this gasket will fit my Yanmar engine?\u003c\/summary\u003e\n    \u003cp\u003eThis gasket is designed for Yanmar's 2GM and 3GM series engines. Please review the 'Engine \u0026amp; Model Compatibility' table on this page and cross-reference the OEM part number (121000-03071) with your engine's service manual to ensure an exact match.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the signs of a failing breather cover gasket?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs of a worn or failed gasket include visible oil leaks or seepage around the breather cover, a smell of burning oil, or a dirty, grimy engine bay in that specific area. This can lead to low oil levels and poor engine performance if not addressed.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs any sealant needed when installing this gasket?\u003c\/summary\u003e\n    \u003cp\u003eGenerally, this type of paper\/composite gasket is designed to be installed dry. Applying sealant is not usually recommended unless explicitly stated in your engine's service manual, as it can sometimes interfere with a proper seal.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should gaskets like this be replaced?\u003c\/summary\u003e\n    \u003cp\u003eThere is no fixed replacement interval. Gaskets should be replaced whenever the component they seal is removed for service, or immediately if you notice any signs of leakage or damage.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n    \u003cp\u003eThis listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for consistency and quality.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n    \u003cp\u003eWe ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n    \u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement part, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is highly recommended for safety and optimal performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — We offer free standard delivery to most regions, with typical transit times of 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50626123694395,"sku":"121000-03071","price":9.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/121000-03071_a5ce8056-7407-40df-822d-9b191fe9bf5f.jpg?v=1759816326"},{"product_id":"exhaust-manifold-gasket-fits-yanmar-3jh-series-marine-diesel-engines-replaces-129150-13110","title":"Exhaust Manifold Gasket – Fits Yanmar 3JH Series Marine Diesel Engines (Replaces 129150-13110)","description":"\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis high-quality \u003cstrong\u003eExhaust Manifold Gasket\u003c\/strong\u003e is engineered to fit a wide range of Yanmar 3JH Series marine diesel engines, including the 3JH25A, 3JH30A, 3JH3E, 3JH4E, and 3JH5E models. It is fully compatible with both main and auxiliary engine applications, ensuring a reliable seal for the exhaust manifold connection.\u003c\/p\u003e\n  \u003cp\u003eThis part is a direct replacement for Yanmar OEM part number 129150-13110.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eInstallation Method: Direct replacement\u003c\/li\u003e\n    \u003cli\u003ePrimary Application: Used on exhaust manifold connection\u003c\/li\u003e\n    \u003cli\u003eEngine Fuel Type: Diesel\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e129150-13110\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n  \u003cp\u003eThis gasket is designed for a broad range of Yanmar engines. Verify your specific model for an exact match.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel\u003c\/th\u003e\n          \u003cth\u003eRated HP\u003c\/th\u003e\n          \u003cth\u003eStroke\u003c\/th\u003e\n          \u003cth\u003eOEM Part No.\u003c\/th\u003e\n          \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3JH25A\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003eUsed on fresh water cooler, keel cooler spec\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3JH30A\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003eUsed on fresh water cooler, keel cooler spec\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3JH2\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3JH2-TE\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3JH2BE\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3JH2TBE\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3JH3E\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3JH3E-YEU-E\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3JH4E\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3JH5E\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3JH5AE\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3TNV88F\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30F\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3TNE84\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3TNV88-BDSA\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3TNV88\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3TN84L\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3TN84\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e129150-13110\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eExhaust Manifold Gasket\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n    \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eDiesel\u003c\/dd\u003e\n    \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e22.5\" L x 7.0\" W x 0.1\" H\u003c\/dd\u003e\n    \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eUsed on exhaust manifold connection\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Gasket, Exhaust Manifold (129150-13110)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eEnsure the engine is completely cool and the battery is disconnected before starting work.\u003c\/li\u003e\n    \u003cli\u003eCarefully remove the exhaust manifold, taking note of all connected components and fasteners.\u003c\/li\u003e\n    \u003cli\u003eThoroughly clean both the cylinder head and manifold mating surfaces. Remove all old gasket material and carbon buildup.\u003c\/li\u003e\n    \u003cli\u003ePosition the new gasket correctly, ensuring all bolt holes align perfectly.\u003c\/li\u003e\n    \u003cli\u003eReinstall the exhaust manifold and tighten the fasteners to the manufacturer's specified torque sequence and values.\u003c\/li\u003e\n    \u003cli\u003eReconnect any other components and the battery, then start the engine to check for exhaust leaks.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n  \n\u003csection\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failing exhaust manifold gasket?\u003c\/summary\u003e\n  \u003cp\u003eCommon symptoms include a ticking or hissing sound from the engine bay (especially when cold), decreased engine performance, poor fuel economy, and the smell of exhaust fumes inside the cabin or cockpit.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this gasket fit my Yanmar 3GM30F engine?\u003c\/summary\u003e\n  \u003cp\u003eYes, this gasket is listed as compatible with the Yanmar 3GM30F model. However, always double-check the part number and visual appearance against your old part before installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eThe notes for my 3JH30A engine mention \"fresh water cooler spec.\" Is this the right gasket?\u003c\/summary\u003e\n  \u003cp\u003eYes. This part is primarily the exhaust manifold gasket, but on certain engine configurations like the 3JH30A with keel cooling, it also serves as a gasket for the cooler housing where it connects to the manifold assembly. It is the correct part for this application.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should this gasket be replaced?\u003c\/summary\u003e\n  \u003cp\u003eGaskets should be inspected during routine engine maintenance and replaced whenever the exhaust manifold is removed. There is no fixed replacement interval; replace it at the first sign of a leak to prevent further damage.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003ePro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003eFast Global Fulfillment — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003eManufacturer-Direct Value — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50626123759931,"sku":"129150-13110","price":19.02,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/129150-13110_286f08c8-e4bb-42bf-8b73-6f37f15d05da.jpg?v=1759816329"},{"product_id":"exhaust-manifold-cover-gasket-fits-yanmar-3gm30-series-marine-engines-replaces-128370-13181","title":"Exhaust Manifold Cover Gasket – Fits Yanmar 3GM30 Series Marine Engines (Replaces 128370-13181)","description":"\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis high-quality \u003cstrong\u003eExhaust Manifold Cover Gasket – Fits Yanmar 3GM30 Series Marine Engines (Replaces 128370-13181)\u003c\/strong\u003e provides a leak-free seal between the exhaust manifold and its cover on Yanmar 3GM30 series marine diesel engines. It is engineered for a precise fit on models including the 3GM30, 3GM30F, 3GM30F-YEU, 3GM30VE, 3GM30B, and 3GM30C.\u003c\/p\u003e\n  \u003cp\u003eThis part is a direct cross-reference for Yanmar part number 128370-13181.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eEngineered for direct OEM replacement installation.\u003c\/li\u003e\n    \u003cli\u003eFormulated from durable, non-asbestos material for marine environments.\u003c\/li\u003e\n    \u003cli\u003eEnsures a reliable, leak-free seal for the exhaust system.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003ePart Number\u003c\/th\u003e\n          \u003cth\u003eSuperseded By\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e128370-13180\u003c\/td\u003e\n          \u003ctd\u003e128370-13181\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e128370-13181\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eConfirm your engine model in the table below.\u003c\/p\u003e\n  \u003cp\u003eThis gasket is specifically designed for the following Yanmar 3GM30 series engines.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility for Yanmar\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel\u003c\/th\u003e\n          \u003cth\u003eRated HP\u003c\/th\u003e\n          \u003cth\u003eStroke\u003c\/th\u003e\n          \u003cth\u003eOEM Part No.\u003c\/th\u003e\n          \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3GM30\u003c\/td\u003e\n          \u003ctd\u003e27\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e128370-13181\u003c\/td\u003e\n          \u003ctd\u003eSupersedes 128370-13180\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3GM30F\u003c\/td\u003e\n          \u003ctd\u003e27\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e128370-13181\u003c\/td\u003e\n          \u003ctd\u003eFreshwater cooled version\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3GM30F-YEU\u003c\/td\u003e\n          \u003ctd\u003e27\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e128370-13181\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3GM30VE\u003c\/td\u003e\n          \u003ctd\u003e30\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e128370-13181\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3GM30B\u003c\/td\u003e\n          \u003ctd\u003e27\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e128370-13181\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3GM30C\u003c\/td\u003e\n          \u003ctd\u003e27\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e128370-13181\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eExhaust Manifold Cover Gasket\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eMarine engines\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect OEM replacement\u003c\/dd\u003e\n    \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eDiesel\u003c\/dd\u003e\n    \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eNon-asbestos gasket material\u003c\/dd\u003e\n    \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e24.5\" L x 6.5\" W x 0.1\" H\u003c\/dd\u003e\n    \u003cdt\u003eOEM Part Number\u003c\/dt\u003e\n\u003cdd\u003e128370-13181\u003c\/dd\u003e\n    \u003cdt\u003eSupersedes\u003c\/dt\u003e\n\u003cdd\u003e128370-13180\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Exhaust Manifold Cover Gasket (Replaces 128370-13181)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eEnsure the engine is off and completely cool before starting work. Disconnect the battery.\u003c\/li\u003e\n    \u003cli\u003eDrain the engine coolant to a level below the exhaust manifold to prevent spills.\u003c\/li\u003e\n    \u003cli\u003eCarefully remove any components blocking access to the exhaust manifold cover.\u003c\/li\u003e\n    \u003cli\u003eUnbolt and remove the exhaust manifold cover, then peel off the old gasket.\u003c\/li\u003e\n    \u003cli\u003eThoroughly clean both mating surfaces. Use a plastic scraper and a suitable solvent to remove all old gasket material, carbon, and debris. Ensure surfaces are smooth and dry.\u003c\/li\u003e\n    \u003cli\u003ePosition the new gasket onto the manifold, aligning it with the bolt holes. Do not use sealant unless specified by your engine's service manual.\u003c\/li\u003e\n    \u003cli\u003eReinstall the cover and tighten the bolts in the sequence and to the torque values recommended by the manufacturer.\u003c\/li\u003e\n    \u003cli\u003eReconnect any components that were removed, refill the coolant, and reconnect the battery.\u003c\/li\u003e\n    \u003cli\u003eStart the engine and carefully inspect for any coolant or exhaust leaks around the cover.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if this gasket fits my engine?\u003c\/summary\u003e\n    \u003cp\u003eThis gasket is designed for Yanmar 3GM30 series engines. Please verify your specific model against the compatibility table provided on this page. Matching the OEM part number (128370-13181) is the most reliable way to ensure a correct fit.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the signs of a failing exhaust manifold cover gasket?\u003c\/summary\u003e\n    \u003cp\u003eCommon symptoms include visible coolant leaks around the manifold cover, engine overheating, white steam from the exhaust (as coolant burns off), or a drop in the coolant reservoir level without an obvious external leak.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I reuse my old gasket?\u003c\/summary\u003e\n    \u003cp\u003eNo. Gaskets are single-use components designed to compress and create a seal under specific pressure. Once used, they lose their ability to seal effectively and must be replaced.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I need to apply sealant to this gasket?\u003c\/summary\u003e\n    \u003cp\u003eThis gasket is typically designed for a dry installation. Applying sealant can sometimes interfere with proper sealing. Always follow the procedures outlined in your engine's official service manual for the most accurate guidance.\u003c\/p\u003e\n    \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the difference between the superseded (128370-13180) and this new part?\u003c\/summary\u003e\n    \u003cp\u003eThe newer part number (128370-13181) typically represents a material update, often to a more durable or environmentally compliant non-asbestos composite. It is a direct, improved replacement for the older version.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n    \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n    \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n    \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50626124316987,"sku":"128370-13181","price":99.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/128370-13181_458ec216-9d4b-47f2-aee9-a1fe1ba424a9.jpg?v=1759816349"},{"product_id":"yanmar-exhaust-gasket-128370-13201-fits-yanmar-2gm-3gm-series-marine-diesel-engines","title":"Yanmar Exhaust Gasket (128370-13201) – Fits Yanmar 2GM, 3GM Series Marine Diesel Engines","description":"\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis is a high-quality aftermarket \u003cstrong\u003eYanmar Exhaust Gasket (128370-13201)\u003c\/strong\u003e, designed to serve as the mounting gasket for the exhaust mixing elbow assembly. It is engineered for a precise fit on Yanmar 2GM, 3GM, 3HM, and early 2YM\/3YM series marine diesel engines where the elbow assembly bolts to the heat exchanger.\u003c\/p\u003e\n\u003cp\u003eThis part is a direct replacement for Yanmar OEM part number 128370-13201.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered for high-temperature and pressure an environment.\u003c\/li\u003e\n\u003cli\u003eFeatures a four-bolt flange mounting configuration.\u003c\/li\u003e\n\u003cli\u003eEnsures a secure seal between the mixing elbow and the heat exchanger.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e1GMYS\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM20\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM20F\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1980–1983\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GMF\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1980–1983\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2YM15\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003eEarly models with 5\/8 hose fitted only\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM30\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM30F\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GMD\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GMF\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GMFH\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3HM\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3HM35\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3YM20\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003eEarly models with 5\/8 hose fitted only\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3YM30\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e128370-13201\u003c\/td\u003e\n        \u003ctd\u003eEarly models with 5\/8 hose fitted only\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eExhaust Mixing Elbow Gasket\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eHigh-temperature and pressure-resistant material\u003c\/dd\u003e\n   \u003cdt\u003eProduct Dimensions\u003c\/dt\u003e\n\u003cdd\u003e12.0\" L × 10.0\" W × 0.1\" H\u003c\/dd\u003e\n  \u003cdt\u003eMounting\u003c\/dt\u003e\n\u003cdd\u003e4-bolt flange\u003c\/dd\u003e\n  \u003cdt\u003eCompatibility\u003c\/dt\u003e\n\u003cdd\u003eIndirect fresh water cooled 2\/3GM, all 3HM, some direct raw water cooled 3GM, early 2\/3YM with 5\/8 hose fitted\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 ×\u003c\/span\u003e Exhaust Mixing Elbow Gasket (128370-13201)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eEnsure the engine is completely cool and disconnect the battery.\u003c\/li\u003e\n  \u003cli\u003eClose the raw water seacock and drain the cooling system as needed.\u003c\/li\u003e\n  \u003cli\u003eCarefully unbolt the exhaust mixing elbow from the heat exchanger, taking note of all connected hoses.\u003c\/li\u003e\n  \u003cli\u003eRemove the old gasket and thoroughly clean both mating surfaces. Ensure they are free of old gasket material, corrosion, and debris.\u003c\/li\u003e\n  \u003cli\u003ePosition the new gasket, aligning it with the bolt holes.\u003c\/li\u003e\n  \u003cli\u003eRe-install the exhaust mixing elbow, tightening the bolts in a star pattern to the manufacturer's recommended torque specifications.\u003c\/li\u003e\n  \u003cli\u003eReconnect all hoses, open the seacock, and check for leaks after starting the engine.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I know if this gasket fits my Yanmar engine?\u003c\/summary\u003e\u003cp\u003eThis gasket fits a specific range of Yanmar engines, including the 2GM, 3GM, 3HM, and early 2YM\/3YM series. The most reliable method is to match your existing part number to 128370-13201. Always check the compatibility table and notes, especially for YM series engines, which have specific fitment requirements.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the signs of a failing exhaust gasket?\u003c\/summary\u003e\u003cp\u003eCommon signs include water or exhaust soot leaking from the joint between the mixing elbow and heat exchanger, a noticeable drop in engine cooling performance, or an unusual hissing sound from the engine bay. If you see salt crystals or rust streaks around the flange, the gasket has likely failed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this gasket fit my 2YM15 or 3YM30 engine?\u003c\/summary\u003e\u003cp\u003eIt may, but only on early models that were equipped with a 5\/8\" water hose fitting on the mixing elbow. Later models use a different configuration. Please verify your specific engine's setup before ordering.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this gasket reusable?\u003c\/summary\u003e\u003cp\u003eNo. This is a single-use, crush-style gasket. It is designed to be compressed once to create a seal. Reusing it will likely result in leaks and potential engine damage.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat's the difference between this aftermarket gasket and a genuine Yanmar part?\u003c\/summary\u003e\u003cp\u003eFunctionally, there is no difference. Our aftermarket gaskets are manufactured to meet or exceed OEM specifications using comparable high-temperature materials. They are produced in an ISO 9002 certified facility and undergo strict quality control to ensure reliable performance.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n\u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50626124906811,"sku":"128370-13201","price":16.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/128370-13201_eaa4c1b1-60f4-4db2-bc11-bd54192b7b5a.jpg?v=1759816374"},{"product_id":"cylinder-head-gasket-fits-yanmar-3jh-series-marine-engines-replaces-129171-01330","title":"Cylinder Head Gasket – Fits Yanmar 3JH Series Marine Engines (Replaces 129171-01330)","description":"\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis is a high-quality aftermarket \u003cstrong\u003eCylinder Head Gasket – Fits Yanmar 3JH Series Marine Engines (Replaces 129171-01330)\u003c\/strong\u003e, designed for 3-cylinder, 4-stroke marine diesel engines from the 1990s and 2000s. It ensures a reliable seal between the cylinder head and engine block.\u003c\/p\u003e\n\u003cp\u003eThis part is a direct replacement for Yanmar part number 129171-01330 and equivalent aftermarket references.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eEngineered for direct-fit installation.\u003c\/li\u003e\n    \u003cli\u003eConstructed from durable multi-layer steel\/composite material.\u003c\/li\u003e\n    \u003cli\u003eMeets standard 1.4 mm thickness specification for a precise seal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Cross-Reference\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAftermarket\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eThis gasket fits a wide range of Yanmar 3JH series engines, including turbocharged and generator models.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Compatible Yanmar Engine Models\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH2\u003c\/td\u003e\n        \u003ctd\u003e25-30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH25\u003c\/td\u003e\n        \u003ctd\u003e25\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH30\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH2(B)E\u003c\/td\u003e\n        \u003ctd\u003e25-30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH2BE\u003c\/td\u003e\n        \u003ctd\u003e25-30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH2E\u003c\/td\u003e\n        \u003ctd\u003e25-30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH2T(B)E\u003c\/td\u003e\n        \u003ctd\u003e25-30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003eTurbocharged model\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH2TBE\u003c\/td\u003e\n        \u003ctd\u003e25-30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003eTurbocharged model\u003c\/td\u003e\n      \u003c\/tr\u003e\n        \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH2TE\u003c\/td\u003e\n        \u003ctd\u003e25-30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003eTurbocharged model\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH2S-TBE\u003c\/td\u003e\n        \u003ctd\u003e25-30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003eSpecial turbocharged model\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH2G-TBE\u003c\/td\u003e\n        \u003ctd\u003e25-30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003eGenerator turbocharged model\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH2L-TNE\u003c\/td\u003e\n        \u003ctd\u003e25-30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003eLong-block turbocharged model\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH2Z\u003c\/td\u003e\n        \u003ctd\u003e25-30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e129171-01330\u003c\/td\u003e\n        \u003ctd\u003eGenerator application\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eCylinder Head Gasket\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eDiesel\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eMulti-layer steel\/composite\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e31.0 cm L x 16.0 cm W x 0.1 cm H\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e0.5 kg (1.1 lb)\u003c\/dd\u003e\n  \u003cdt\u003eThickness\u003c\/dt\u003e\n\u003cdd\u003e1.4 mm\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Cylinder Head Gasket (129171-01330)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n    \u003cli\u003eDisconnect the battery and drain the engine coolant completely.\u003c\/li\u003e\n    \u003cli\u003eRemove the intake\/exhaust manifolds, valve cover, and rocker arm assembly.\u003c\/li\u003e\n    \u003cli\u003eLoosen and remove the cylinder head bolts in the reverse order of the manufacturer's specified torque sequence.\u003c\/li\u003e\n    \u003cli\u003eCarefully lift the cylinder head off the engine block.\u003c\/li\u003e\n    \u003cli\u003eRemove the old gasket and thoroughly clean both mating surfaces of any old gasket material or debris.\u003c\/li\u003e\n    \u003cli\u003ePosition the new gasket correctly on the engine block; check for any \"TOP\" or \"FRONT\" markings.\u003c\/li\u003e\n    \u003cli\u003eReinstall the cylinder head. Lubricate and install the head bolts, tightening them in stages according to the official torque sequence and specifications.\u003c\/li\u003e\n    \u003cli\u003eReassemble the rocker arms, manifolds, and all other components removed.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if this gasket fits my Yanmar engine?\u003c\/summary\u003e\n  \u003cp\u003eThis gasket is specifically designed for the Yanmar 3JH series, including models like the 3JH2, 3JH25, and various turbo versions. To ensure a perfect match, please verify that your engine model is on our compatibility list and that the part number you are replacing is 129171-01330.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failed cylinder head gasket?\u003c\/summary\u003e\n  \u003cp\u003eCommon symptoms of a blown head gasket include engine overheating, white smoke from the exhaust (indicating burning coolant), milky or frothy engine oil (coolant mixing with oil), loss of power, or poor engine compression.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this gasket thicker or thinner than the original?\u003c\/summary\u003e\n  \u003cp\u003eThis gasket has a standard thickness of 1.4 mm, which matches the OEM specification for most Yanmar 3JH applications. Always consult your engine's service manual to confirm the required gasket thickness, especially if the head or block has been machined.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I reuse my old cylinder head gasket?\u003c\/summary\u003e\n  \u003cp\u003eNo. Cylinder head gaskets are \"crush\" type gaskets designed for one-time use. They deform to create a perfect seal and must be replaced every time the cylinder head is removed to ensure engine integrity.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50626125332795,"sku":"129171-01330","price":99.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/CylinderHeadGasket_FitsYanmar3JHSeriesMarineEngines_Replaces129171-01330.jpg?v=1762820182"},{"product_id":"oil-pump-gasket-fits-yanmar-2gm-3gm-series-marine-engines-replaces-121450-32021","title":"Oil Pump Gasket – Fits Yanmar 2GM, 3GM Series Marine Engines (Replaces 121450-32021)","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis high-quality \u003cstrong\u003eOil Pump Gasket – Fits Yanmar 2GM, 3GM Series Marine Engines\u003c\/strong\u003e creates a secure seal between the oil pump and the engine block. It is designed for a precise fit on a wide range of Yanmar marine diesel engines, including the 1GM, 2GM, and 3GM series, to prevent oil leaks and maintain essential oil pressure for optimal engine performance.\u003c\/p\u003e\n\u003cp\u003eThis part is a direct replacement for Yanmar OEM part number 121450-32021.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eInstalls directly between the oil pump and engine block.\u003c\/li\u003e\n    \u003cli\u003eEngineered for use in diesel marine environments.\u003c\/li\u003e\n    \u003cli\u003ePrevents oil leakage and pressure loss from the oil pump assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eThis gasket fits a broad range of Yanmar GM series marine engines. It is also found in several cross-application Yanmar tractors, but verification for marine use is recommended.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e1GM10\u003c\/td\u003e\n        \u003ctd\u003e9\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM20, 2GM20F\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM20-YEU, 2GM20F-YEU\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GMF\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM20C-YEU\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM20FVE\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM30, 3GM30F\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM30-YEU, 3GM30F-YEU\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM30FVE\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GMD\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GMF\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GMLE\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM30VE\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003eYM140, YM147, YM169, YM180, YM186, YM187, YM220, YM226, YM250, YM276\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003eTractor application\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003eYM1401, YM1502, YM1510, YM1601, YM1602, YM1610, YM1702\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003eTractor application\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003eYM1720D, YM1802, YM1810, YM1820, YM2001, YM2002, YM2010, YM2020\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003eTractor application\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003eYM2202, YM2301, YM2310, YM2310D, YM2402, YM2420, YMG1800, YMG2000\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e121450-32021\u003c\/td\u003e\n        \u003ctd\u003eTractor application\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eOil Pump Gasket\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect fit between oil pump and engine block\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eDiesel\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eGasket material (composite)\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e9.5\" × 7.5\" × 0.1\"\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eSeals oil pump to engine block to prevent leaks and maintain oil pressure\u003c\/dd\u003e\n  \u003cdt\u003eOEM Reference\u003c\/dt\u003e\n\u003cdd\u003eYanmar Marine part 121450-32021\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Oil Pump Gasket (121450-32021)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the vessel's battery and ensure the engine is cool.\u003c\/li\u003e\n  \u003cli\u003ePosition a drain pan under the engine and drain the engine oil completely.\u003c\/li\u003e\n  \u003cli\u003eCarefully remove any components obstructing access to the oil pump.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and remove the oil pump from the engine block.\u003c\/li\u003e\n  \u003cli\u003eThoroughly clean the mating surfaces of both the engine block and the oil pump, removing all traces of the old gasket and any sealant.\u003c\/li\u003e\n  \u003cli\u003ePosition the new gasket onto the engine block, aligning it with the bolt holes.\u003c\/li\u003e\n  \u003cli\u003eReinstall the oil pump, ensuring it is seated correctly against the new gasket.\u003c\/li\u003e\n  \u003cli\u003eTighten the pump mounting bolts to the manufacturer's specified torque in the correct sequence.\u003c\/li\u003e\n  \u003cli\u003eRefill the engine with the correct grade and quantity of oil.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery, start the engine, and carefully inspect the oil pump area for any signs of leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if this gasket will fit my Yanmar engine?\u003c\/summary\u003e\n  \u003cp\u003eThe best method is to confirm your engine model is listed in the compatibility table. Also, compare the OEM part number 121450-32021 with the number listed in your engine's service manual or stamped on your old part.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failing oil pump gasket?\u003c\/summary\u003e\n  \u003cp\u003eCommon symptoms include visible oil leaks around the oil pump mounting area, a gradual drop in oil level without obvious cause, or low oil pressure warnings on your dashboard. An oily bilge may also indicate a leak.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this gasket a direct replacement for the original Yanmar part?\u003c\/summary\u003e\n  \u003cp\u003eYes, it is designed to be a direct-fit replacement for Yanmar part number 121450-32021, matching the original in form, fit, and function for a reliable seal.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should the oil pump gasket be replaced?\u003c\/summary\u003e\n  \u003cp\u003eThere is no fixed replacement interval. This gasket should be replaced whenever the oil pump is removed for service or if it develops a leak.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I reuse my old oil pump gasket?\u003c\/summary\u003e\n  \u003cp\u003eNo. Gaskets are single-use components that compress to create a seal. Reusing an old gasket will almost certainly result in leaks and improper sealing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan this part be used in a Yanmar tractor engine?\u003c\/summary\u003e\n  \u003cp\u003eWhile this gasket is known to fit many Yanmar tractor models as a cross-reference part, our primary focus and testing are for marine applications. Please verify fitment for your specific tractor model independently.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50626126020923,"sku":"121450-32021","price":14.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/121450-32021_6251af23-a68d-49ed-8c6a-58769fd26e95.jpg?v=1759816422"},{"product_id":"gasket-cover-fits-yanmar-3jh25a-3jh30a-marine-engines-replaces-129100-01621","title":"Gasket, Cover – Fits Yanmar 3JH25A\/3JH30A Marine Engines (Replaces 129100-01621)","description":"\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis is a high-quality replacement \u003cstrong\u003eGasket, Cover – Fits Yanmar 3JH25A\/3JH30A Marine Engines (Replaces 129100-01621)\u003c\/strong\u003e, designed to provide a proper seal for the engine's rear seal cover assembly. It is engineered to meet or exceed original manufacturer specifications, ensuring reliable performance in marine environments.\u003c\/p\u003e\n  \u003cp\u003eThis part is a direct replacement for Yanmar part number 129100-01621.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eInstallation Method: Direct replacement\u003c\/li\u003e\n    \u003cli\u003eEngineered for marine diesel applications\u003c\/li\u003e\n    \u003cli\u003eIncludes one cover gasket\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e129100-01621\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel\u003c\/th\u003e\n          \u003cth\u003eRated HP\u003c\/th\u003e\n          \u003cth\u003eStroke\u003c\/th\u003e\n          \u003cth\u003eOEM Part No.\u003c\/th\u003e\n          \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3JH25A\u003c\/td\u003e\n          \u003ctd\u003e25\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e129100-01621\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e3JH30A\u003c\/td\u003e\n          \u003ctd\u003e30\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e129100-01621\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eGasket, Rear Seal Cover\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n    \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003ePaper\/Composite\u003c\/dd\u003e\n    \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eOriginal manufacturer specification\u003c\/dd\u003e\n    \u003cdt\u003eProduct Dimensions\u003c\/dt\u003e\n\u003cdd\u003e21.0cm L x 20.0cm W x 0.1cm H\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Gasket, Cover (129100-01621)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the negative battery terminal to prevent accidental shorts.\u003c\/li\u003e\n    \u003cli\u003eIf necessary, drain engine oil or coolant to avoid spills when the cover is removed.\u003c\/li\u003e\n    \u003cli\u003eRemove any components obstructing access to the rear seal cover.\u003c\/li\u003e\n    \u003cli\u003eCarefully unbolt and remove the cover. The old gasket may be stuck to the cover or the engine block.\u003c\/li\u003e\n    \u003cli\u003eThoroughly clean both mating surfaces. Use a plastic scraper and appropriate solvent to remove all traces of old gasket material and sealant without scratching the metal.\u003c\/li\u003e\n    \u003cli\u003ePosition the new gasket correctly on the engine block or cover, aligning all bolt holes.\u003c\/li\u003e\n    \u003cli\u003eReinstall the cover and tighten the bolts in a crossing pattern to the manufacturer's specified torque to ensure even pressure.\u003c\/li\u003e\n    \u003cli\u003eReinstall any components that were removed. Refill drained fluids.\u003c\/li\u003e\n    \u003cli\u003eReconnect the battery, start the engine, and carefully inspect for any leaks around the cover.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow can I confirm this gasket fits my Yanmar engine?\u003c\/summary\u003e\n    \u003cp\u003eThis gasket is a direct fit for Yanmar models 3JH25A and 3JH30A. Verify your engine model and cross-reference the OEM part number 129100-01621. Visually comparing your old gasket to the product images is also a reliable confirmation step.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are common signs of a failed rear seal cover gasket?\u003c\/summary\u003e\n    \u003cp\u003eThe most common sign of a failed gasket is an oil leak from the area where the rear seal cover meets the engine block. You may notice oil drips under the engine or an accumulation of grime and oil on the housing itself.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this gasket require any sealant during installation?\u003c\/summary\u003e\n    \u003cp\u003eTypically, paper or composite gaskets like this one are designed to be installed dry. However, always consult your engine's service manual. Some applications may recommend a very thin coat of a specific gasket sealant or tackifier to hold it in place during assembly.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should this gasket be replaced?\u003c\/summary\u003e\n    \u003cp\u003eThis gasket does not have a set replacement interval. It should be replaced whenever the rear seal cover is removed for service, or if it shows signs of leaking.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n    \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n    \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n    \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50626126512443,"sku":"129100-01621","price":99.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/129100-01621_1b1a8b2e-88eb-48ad-a4dc-27e4dc10bd05.jpg?v=1759816435"},{"product_id":"stainless-steel-exhaust-mixing-elbow-fits-yanmar-marine-diesel-engines","title":"Stainless Steel Exhaust Mixing Elbow - Fits Yanmar Marine Diesel Engines","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis high-quality \u003cstrong\u003eStainless Steel Exhaust Mixing Elbow\u003c\/strong\u003e is designed as a direct replacement for exhaust systems on Yanmar marine diesel engines, including the 2GM, 3GM, and similar series from the 1980s through the 2000s, covering models from 9 to 30 HP.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct interchange for Yanmar OEM part numbers 124223-13500, 124223-13501, and 124223-13502.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect bolt-on installation for straightforward replacement.\u003c\/li\u003e\n  \u003cli\u003eConstructed from corrosion-resistant 304 or 316 grade stainless steel for extended service life.\u003c\/li\u003e\n  \u003cli\u003eIncludes a new mounting gasket for a complete installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e124223-13500\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e124223-13501\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e124223-13502\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eThis elbow is confirmed to fit many popular Yanmar GM and JH series engines, providing a reliable, long-lasting replacement for the original cast iron part.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM20F\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1980s–2000s\u003c\/td\u003e\n        \u003ctd\u003e124223-13500\u003c\/td\u003e\n        \u003ctd\u003eAlso fits related 2GM models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM30F\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1980s–2000s\u003c\/td\u003e\n        \u003ctd\u003e124223-13500\u003c\/td\u003e\n        \u003ctd\u003eAlso fits related 3GM models\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3JH2E\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e124223-13500\u003c\/td\u003e\n        \u003ctd\u003eConfirmation needed\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2QM20\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e124223-13500\u003c\/td\u003e\n        \u003ctd\u003eConfirmation needed\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eExhaust Mixing Elbow\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect bolt-on replacement\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eDiesel\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eBolt flange to manifold, hose connection for exhaust\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eStainless Steel (304 or 316 grade)\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eSilver\/Metallic\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eHeight: 7.5 in; Width: 9.0 in; Length: 19.0 in\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eBolt flange with threaded sleeve connector\u003c\/dd\u003e\n  \u003cdt\u003eOperating Temperature\u003c\/dt\u003e\n\u003cdd\u003eRated for marine diesel exhaust temperatures (400-500°C)\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eWater injection port for exhaust cooling\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Stainless Steel Exhaust Mixing Elbow (124223-13500)\u003c\/li\u003e\n  \u003cli\u003e1 x Mounting Gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eEnsure the engine is completely cool before beginning work.\u003c\/li\u003e\n  \u003cli\u003eClose the raw water seacock to prevent water from entering the vessel.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the exhaust hose and the smaller water injection hose from the old elbow.\u003c\/li\u003e\n  \u003cli\u003eCarefully remove the nuts or bolts securing the elbow to the exhaust manifold.\u003c\/li\u003e\n  \u003cli\u003eClean the mating surface on the manifold, ensuring all old gasket material is removed for a clean seal.\u003c\/li\u003e\n  \u003cli\u003ePlace the new gasket onto the manifold studs.\u003c\/li\u003e\n  \u003cli\u003eInstall the new stainless steel mixing elbow, ensuring a flush and secure fit.\u003c\/li\u003e\n  \u003cli\u003eTighten the mounting nuts or bolts evenly to the manufacturer-specified torque.\u003c\/li\u003e\n  \u003cli\u003eReconnect the water injection and main exhaust hoses, securing the clamps firmly.\u003c\/li\u003e\n  \u003cli\u003eOpen the raw water seacock.\u003c\/li\u003e\n  \u003cli\u003eStart the engine and immediately check for any exhaust or water leaks around the new elbow and its connections.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if this elbow fits my specific Yanmar engine?\u003c\/summary\u003e\n  \u003cp\u003eThis elbow is a direct fit for Yanmar 2GM and 3GM series engines from the 1980s to 2000s. It also fits some 2QM and 3JH models. Always compare your old part to our photos and check the OEM part number (124223-13500, 124223-13501, or 124223-13502) to guarantee compatibility.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failing mixing elbow?\u003c\/summary\u003e\n  \u003cp\u003eCommon signs include steam or water in the engine bay, overheating, loss of engine power, excessive black smoke from the exhaust, and visible corrosion or leaks on the elbow itself. A clogged mixing elbow restricts exhaust flow and can cause serious engine damage.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhy choose a stainless steel part over the original cast iron?\u003c\/summary\u003e\n  \u003cp\u003eStainless steel offers significantly better corrosion resistance compared to the original cast iron elbows, especially in a saltwater environment. This leads to a longer service life and reduces the risk of premature failure from rust-through.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should a mixing elbow be inspected or replaced?\u003c\/summary\u003e\n  \u003cp\u003eIt is good practice to inspect the mixing elbow annually for signs of corrosion, carbon buildup, or blockage. While service life varies, many boat owners replace them every 3-5 years as preventative maintenance to avoid unexpected failure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this a genuine OEM part?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50647222681915,"sku":"MAR128370-13550INOX","price":99.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/MAR128370-13550INOX_774dd9ef-6760-4bf0-8eb1-4356de419341.jpg?v=1760020030"},{"product_id":"stainless-steel-exhaust-mixing-elbow-fits-yanmar-2gm-3gm-series-replaces-104211-13520","title":"Stainless Steel Exhaust Mixing Elbow – Fits Yanmar 2GM\/3GM Series (Replaces 104211-13520)","description":"\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis high-quality \u003cstrong\u003eStainless Steel Exhaust Mixing Elbow\u003c\/strong\u003e is an aftermarket replacement designed for Yanmar 2GM and 3GM series diesel engines, typically ranging from 15-30 HP and manufactured between the 1980s and 2000s. It serves as a crucial component in the marine exhaust system, mixing cooling water with hot exhaust gases to safely lower the temperature before discharge.\u003c\/p\u003e\n\u003cp\u003eThis part is a direct replacement for Yanmar part number 104211-13520 and equivalents from other aftermarket manufacturers like HDIM Marine.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect bolt-on installation for straightforward replacement.\u003c\/li\u003e\n\u003cli\u003eConstructed from durable stainless steel for superior corrosion resistance compared to the OEM cast iron version.\u003c\/li\u003e\n\u003cli\u003eFeatures a water-cooled design to efficiently reduce exhaust gas temperatures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Cross-Reference\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e104211-13520\u003c\/td\u003e\n        \u003ctd\u003eOEM Reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHDIM Marine\u003c\/td\u003e\n        \u003ctd\u003eStainless Steel Replacement\u003c\/td\u003e\n        \u003ctd\u003eAftermarket equivalent available from Exhaustelbows.com\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model and year in the table below.\u003c\/p\u003e\n\u003cp\u003eThis part is designed specifically for the following Yanmar Marine engines.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Compatible Engine Models\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM20\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1980s–2000s\u003c\/td\u003e\n        \u003ctd\u003e104211-13520\u003c\/td\u003e\n        \u003ctd\u003eRecommended replacement every 500 hours or 2 years\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM20F\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1980s–2000s\u003c\/td\u003e\n        \u003ctd\u003e104211-13520\u003c\/td\u003e\n        \u003ctd\u003eF denotes sail drive version\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM30\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1980s–2000s\u003c\/td\u003e\n        \u003ctd\u003e104211-13520\u003c\/td\u003e\n        \u003ctd\u003eRecommended replacement every 500 hours or 2 years\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM30F\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1980s–2000s\u003c\/td\u003e\n        \u003ctd\u003e104211-13520\u003c\/td\u003e\n        \u003ctd\u003eF denotes sail drive version\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eExhaust Mixing Elbow\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eStainless Steel (Aftermarket)\u003c\/dd\u003e\n  \u003cdt\u003eOEM Material\u003c\/dt\u003e\n\u003cdd\u003eCast Iron\u003c\/dd\u003e\n  \u003cdt\u003eFinish\u003c\/dt\u003e\n\u003cdd\u003eMetallic\/Silver\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect bolt-on replacement\u003c\/dd\u003e\n  \u003cdt\u003eFitment\u003c\/dt\u003e\n\u003cdd\u003eFlange mount with bolt holes\u003c\/dd\u003e\n  \u003cdt\u003eConnections\u003c\/dt\u003e\n\u003cdd\u003eFlange mount to exhaust manifold, hose connection for water inlet and exhaust outlet\u003c\/dd\u003e\n  \u003cdt\u003eDesign\u003c\/dt\u003e\n\u003cdd\u003eWater-cooled with double-threaded sleeve connector\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e13.7 x 8.95 x 16.2 (L x W x H)\u003c\/dd\u003e\n  \u003cdt\u003eMax Temperature\u003c\/dt\u003e\n\u003cdd\u003eWithstands exhaust temperatures up to 450°C (842°F)\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Stainless Steel Exhaust Mixing Elbow (Aftermarket replacement for Yanmar 104211-13520)\u003c\/li\u003e\n\u003cli\u003e1 x Exhaust Bend Connector\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e1 x Gasket\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eEnsure the engine is completely cool and close the raw water intake seacock.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the vessel's negative battery terminal for safety.\u003c\/li\u003e\n  \u003cli\u003eCarefully detach the wet exhaust hose, water injection hose, and any sensors from the old elbow.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and remove the old mixing elbow from the exhaust manifold. Note the orientation of the connector piece if present.\u003c\/li\u003e\n  \u003cli\u003eThoroughly clean the mating surface on the exhaust manifold, removing all old gasket material and carbon buildup.\u003c\/li\u003e\n  \u003cli\u003ePlace the new gasket onto the manifold, followed by the new stainless steel elbow.\u003c\/li\u003e\n  \u003cli\u003eHand-tighten the bolts to ensure proper alignment, then torque them to the manufacturer's specified values.\u003c\/li\u003e\n  \u003cli\u003eReconnect the water injection and wet exhaust hoses, ensuring all clamps are secure.\u003c\/li\u003e\n  \u003cli\u003eOpen the raw water seacock and reconnect the negative battery terminal.\u003c\/li\u003e\n  \u003cli\u003eStart the engine and immediately check for any exhaust or water leaks around the new installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if this elbow fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eThis elbow is a direct replacement for Yanmar part 104211-13520. It is designed for specific Yanmar GM series models, including the 2GM20, 2GM20F, 3GM30, and 3GM30F. Please consult the compatibility table and verify against your engine's manual or existing part before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhy choose a stainless steel elbow over the cast iron original?\u003c\/summary\u003e\n  \u003cp\u003eThe original OEM elbows are made of cast iron, which is prone to severe corrosion and carbon buildup over time. Our aftermarket elbow is made from high-grade stainless steel, offering superior durability and a significantly longer service life by resisting rust and material degradation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should this part be replaced?\u003c\/summary\u003e\n  \u003cp\u003eAs a critical preventative maintenance item, Yanmar's service manual recommends inspecting the mixing elbow annually and replacing it every 500 hours of operation or every two years, whichever comes first. This helps prevent sudden failure that could damage the engine.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failing mixing elbow?\u003c\/summary\u003e\n  \u003cp\u003eCommon symptoms of a blocked or failing elbow include engine overheating, reduced RPMs or loss of power, excessive black smoke, or signs of water\/steam leaking into the engine compartment. Visual inspection may reveal external corrosion, cracks, or water drips.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs a gasket included?\u003c\/summary\u003e\n  \u003cp\u003eYes, a new gasket is included to ensure a proper, leak-free seal between the new elbow and the exhaust manifold.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n\u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50647222714683,"sku":"MAR128890-13530INOX","price":99.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/MAR128890-13530INOX_8039a853-fcfb-4b3b-b582-d198585a63e0.jpg?v=1760020032"},{"product_id":"water-pump-impeller-fits-yanmar-2gm-3gm-series-jabsco-johnson-replaces-128990-42200","title":"Water Pump Impeller – Fits Yanmar 2GM\/3GM Series, Jabsco, Johnson (Replaces 128990-42200)","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis high-performance neoprene \u003cstrong\u003eWater Pump Impeller – Fits Jabsco, Johnson, Yanmar 2GM\/3GM Series (Replaces 128990-42200)\u003c\/strong\u003e is an essential component for your marine engine's cooling system. Specifically designed for Yanmar 2GM20 and 3GM30 series engines (1981–2003), it also serves as a reliable replacement for a wide range of Jabsco and Johnson marine pumps.\u003c\/p\u003e\n\u003cp\u003eIt provides a direct interchange for Yanmar 128990-42200, Jabsco 18653-0001, Johnson 09-810B, Sierra 18-45713, and others, ensuring broad compatibility for engine maintenance and repair.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered for internal engine cooling pumps.\u003c\/li\u003e\n\u003cli\u003eFeatures a 6-blade design with a brass insert for durability.\u003c\/li\u003e\n\u003cli\u003eConnects via a slotted shaft pin drive for secure installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Cross-Reference\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e18653-0001-P\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003e09-810B\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003e09-810B-1\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-45713\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMallory\u003c\/td\u003e\n\u003ctd\u003e9-45713\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eVolvo\u003c\/td\u003e\n\u003ctd\u003e876097\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCEF\u003c\/td\u003e\n\u003ctd\u003e500101\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJMP\u003c\/td\u003e\n\u003ctd\u003e7050-01\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eFits various Yanmar diesel engines, including the 2GM, 2YM, 3GM, and 3YM series, as a direct replacement for OEM part 128990-42200.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Yanmar Engine Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20-YEU\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1981–2003\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20C-YEU\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1981–2003\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20F-YEU\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1981–2003\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20FC-YEU\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1981–2003\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2YM15\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2000–2010\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30-YEU\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1981–2003\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30C-YEU\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1981–2003\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30F-YEU\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1981–2003\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM30FC-YEU\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1981–2003\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3YM20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2000–2010\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3YM27A\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2000–2010\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3YM30\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2000–2010\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3YM30R\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2000–2010\u003c\/td\u003e\n\u003ctd\u003e128990-42200\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eCompatible with a wide array of Jabsco engine cooling pumps, replacing OEM part 18653-0001.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Jabsco Pump Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29440-1001\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29440-1051\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29440-1101\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29440-1201\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29450-1601\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29450-1641\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29450-1701\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29450-1801\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29460-1001\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29460-1041\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29460-1051\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29460-1101\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29460-1201\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29460-1251\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29460-1261\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29460-1301\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29460-1401\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29460-1431\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29460-1631\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e29460-1701\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e51520-2001\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003eMultiple other pump models\u003c\/td\u003e\n\u003ctd\u003e18653-0001\u003c\/td\u003e\n\u003ctd\u003eContact manufacturer for specific model compatibility\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eReplaces Johnson Pump part 09-810B in F4B and other pump models.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Johnson Pump Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003eF4B\u003c\/td\u003e\n\u003ctd\u003e09-810B\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003e10-24509-01\u003c\/td\u003e\n\u003ctd\u003e09-810B\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003e10-24509-02\u003c\/td\u003e\n\u003ctd\u003e09-810B\u003c\/td\u003e\n\u003ctd\u003eEngine Cooling Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eAlso compatible with numerous Westerbeke engines as a replacement for OEM part 33636.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Westerbeke Engine Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e4.0BCD\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e4.4BCD\u003c\/td\u003e\n\u003ctd\u003e4.4\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e4.4WMD\u003c\/td\u003e\n\u003ctd\u003e4.4\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e5.0BCDA\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e5.0BCDB\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e6.0BCD\u003c\/td\u003e\n\u003ctd\u003e6.0\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e7.6BTD\u003c\/td\u003e\n\u003ctd\u003e7.6\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e7.7WMD\u003c\/td\u003e\n\u003ctd\u003e7.7\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e8.0BTD\u003c\/td\u003e\n\u003ctd\u003e8.0\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e8.0BTDA\u003c\/td\u003e\n\u003ctd\u003e8.0\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e8.0WMD\u003c\/td\u003e\n\u003ctd\u003e8.0\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e10.0BTD\u003c\/td\u003e\n\u003ctd\u003e10.0\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e10.0BTDA\u003c\/td\u003e\n\u003ctd\u003e10.0\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e11.0BTD\u003c\/td\u003e\n\u003ctd\u003e11.0\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e11.0WMD\u003c\/td\u003e\n\u003ctd\u003e11.0\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e12.5BTD\u003c\/td\u003e\n\u003ctd\u003e12.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e12.5BTDA\u003c\/td\u003e\n\u003ctd\u003e12.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e12.5BTDB\u003c\/td\u003e\n\u003ctd\u003e12.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e12.5WMD\u003c\/td\u003e\n\u003ctd\u003e12.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e33636\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eWater Pump Impeller (Flexible Impeller)\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eInternal Engine Cooling Pump\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eSlotted Shaft Pin Drive\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eDiameter: 51 mm (2\"), Width: 22 mm (7\/8\"), Shaft: 12 mm (15\/32\")\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eInternal Engine Cooling Pump Impeller\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003e6 Blades, Brass Insert, Neoprene Material\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Impeller (128990-42200)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eShut off the engine and allow it to cool completely. Close the raw water seacock.\u003c\/li\u003e\n\u003cli\u003eAccess the water pump housing, typically by removing a cover plate held by several screws.\u003c\/li\u003e\n\u003cli\u003eOnce the cover is off, carefully grip the old impeller with pliers or an impeller puller and extract it from the housing.\u003c\/li\u003e\n\u003cli\u003eThoroughly clean the inside of the pump housing, removing any debris, salt deposits, or broken impeller blades.\u003c\/li\u003e\n\u003cli\u003eLightly lubricate the new impeller and the interior surfaces of the pump housing with a water-based lubricant or glycerin.\u003c\/li\u003e\n\u003cli\u003eInsert the new impeller, rotating the driveshaft in the engine's normal direction of operation to correctly bend the blades.\u003c\/li\u003e\n\u003cli\u003eInstall the new gasket (if applicable) and replace the pump cover.\u003c\/li\u003e\n\u003cli\u003eTighten the cover screws in a star pattern to ensure an even seal. Do not overtighten.\u003c\/li\u003e\n\u003cli\u003eOpen the raw water seacock.\u003c\/li\u003e\n\u003cli\u003eStart the engine and immediately check the pump for any leaks and verify that water is flowing from the exhaust outlet.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if this impeller fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eThe best way to confirm fitment is to check your engine's service manual for the correct impeller part number. You can also compare the part numbers listed in our \"Part Number Matrix\" and \"Engine \u0026amp; Model Compatibility\" tables against your existing part or manual.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failing water pump impeller?\u003c\/summary\u003e\n  \u003cp\u003eCommon signs include higher-than-normal engine temperatures, a reduced flow of water from the exhaust outlet, and visible cracks or missing blades on the impeller itself upon inspection. A complete failure can lead to rapid overheating.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should I replace my impeller?\u003c\/summary\u003e\n  \u003cp\u003eAs a general rule, impellers should be inspected annually and replaced every 1-2 years, or after every 200-300 hours of engine use, depending on operating conditions. More frequent replacement may be necessary in silty or sandy water.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I reuse the old gasket or O-ring?\u003c\/summary\u003e\n  \u003cp\u003eIt is strongly recommended to use a new gasket and O-ring during every impeller change to ensure a proper, leak-free seal. Reusing old seals can lead to leaks and pump inefficiency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat should I use to lubricate the new impeller during installation?\u003c\/summary\u003e\n  \u003cp\u003eUse a water-based lubricant or glycerin. Avoid using petroleum-based products like grease or oil, as they can cause the neoprene material to deteriorate over time.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eThe blades on my old impeller were bent. Is that normal?\u003c\/summary\u003e\n  \u003cp\u003eYes, it is normal for the flexible blades to be bent from being seated inside the pump housing. However, you should inspect for blades that are cracked, torn, stiff, or permanently set in their bent position, as these are signs the impeller needs replacement.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717907190075,"sku":"fys12111020","price":18.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/fys12111020.png?v=1762938113"},{"product_id":"air-filter-element-fits-yanmar-2gm-3gm-2ym-3ym-series-replaces-yanmar-128270-12540-128377-12530","title":"Air Filter Element for Yanmar 1GM, 2GM, 3GM, 2YM \u0026 3YM Series – Replaces Yanmar 128270-12540 and 128377-12530","description":"\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eair filter element\u003c\/strong\u003e is designed as an aftermarket replacement for selected Yanmar marine diesel engines in the 1GM, 2GM, 3GM, 2YM, and 3YM series. Listed applications include models such as the 2GM20, 3GM30, 2YM15, 3YM20, 3YM27A, and 3YM30. Always compare the original filter and part number before ordering, especially where model variants or production years overlap.\u003c\/p\u003e\n\u003cp\u003eThis filter is listed as a replacement for Yanmar part numbers \u003cstrong\u003e128270-12540\u003c\/strong\u003e and \u003cstrong\u003e128377-12530\u003c\/strong\u003e, and as an interchange for Sierra part numbers \u003cstrong\u003e18-57703\u003c\/strong\u003e and \u003cstrong\u003e18-79960\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReplacement air filter element for selected Yanmar marine diesel engines.\u003c\/li\u003e\n\u003cli\u003eDesigned to support engine air filtration and intake noise reduction.\u003c\/li\u003e\n\u003cli\u003ePaper filter media with a metal mesh backing or frame.\u003c\/li\u003e\n\u003cli\u003eSingle-element replacement; mounting hardware is not included unless separately specified.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse the following references to compare the filter with the part removed from your engine.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n\u003ctable class=\"ss-table\" aria-label=\"Part Number Cross-Reference Matrix\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e128270-12540\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e128377-12530\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-57703\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-79960\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe applications below are compiled from the supplied fitment information. Model, year, engine configuration, and original part number should be checked together before purchase.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n\u003ctable class=\"ss-table\" aria-label=\"Engine Model Compatibility\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eOEM Part No.\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e1GM, 1GML, 1GML-G2, 1GMY-C, 1GMY-EC, 1GMYS-C, 1GMYS-EC\u003c\/td\u003e\n\u003ctd\u003e7–9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e128270-12540\u003c\/td\u003e\n\u003ctd\u003eVerify the original filter before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM, 2GMF\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1980–1983\u003c\/td\u003e\n\u003ctd\u003e128270-12540\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM20, 2GM20B, 2GM20C, 2GM20F, 2GM20FV, 2GM20FVE, 2GM20V, 2GM20VE\u003c\/td\u003e\n\u003ctd\u003e16–20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1983–2005\u003c\/td\u003e\n\u003ctd\u003e128270-12540\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GMFL, 2GMFL-G1, 2GMFL-G2, 2GMFY, 2GMFY-E, 2GML, 2GML-G2, 2GMLP, 2GMLP-C, 2GMSZK, 2GMY, 2GMYE-EC, 2GMZ\u003c\/td\u003e\n\u003ctd\u003e16–20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e128270-12540\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2YM15\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e128270-12540\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM, 3GM30, 3GM30B, 3GM30C, 3GM30F, 3GM30FV, 3GM30FVE, 3GM30V, 3GM30VE\u003c\/td\u003e\n\u003ctd\u003e27–30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1983–2015\u003c\/td\u003e\n\u003ctd\u003e128270-12540\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GMD, 3GMF, 3GMFLE, 3GMFY, 3GMFY-E, 3GMFYE-E, 3GMLE\u003c\/td\u003e\n\u003ctd\u003e27–30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e128270-12540\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3YM20\u003c\/td\u003e\n\u003ctd\u003e21\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e128270-12540\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3YM27A\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e128270-12540\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3YM30, 3YM30AE, 3YM30R\u003c\/td\u003e\n\u003ctd\u003e29–30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003e128270-12540\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eAir filter element\u003c\/dd\u003e\n\u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eReplacement element for the original air filter housing\u003c\/dd\u003e\n\u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eInside diameter: 98 mm (3.8 in); outside diameter: 107 mm (4.2 in); height: 77 mm (3.03 in)\u003c\/dd\u003e\n\u003cdt\u003eFilter Media\u003c\/dt\u003e\n\u003cdd\u003ePaper filter media\u003c\/dd\u003e\n\u003cdt\u003eFrame or Backing\u003c\/dt\u003e\n\u003cdd\u003eMetal mesh backing or frame\u003c\/dd\u003e\n\u003cdt\u003eColor\u003c\/dt\u003e\n\u003cdd\u003eOff-white or tan filter media with a silver-colored metal frame\u003c\/dd\u003e\n\u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eProvides air filtration and may also contribute to intake noise reduction\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Air filter element\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eReplacement mounting hardware, gaskets, and additional filters are not included unless specifically stated in the order details.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eTurn off the engine and allow it to cool completely before beginning work.\u003c\/li\u003e\n\u003cli\u003eLocate the air filter housing on the engine.\u003c\/li\u003e\n\u003cli\u003eRelease the clips or remove the fasteners securing the housing cover.\u003c\/li\u003e\n\u003cli\u003eRemove the old filter element and note its orientation.\u003c\/li\u003e\n\u003cli\u003eClean dust and debris from inside the housing with a clean, lint-free cloth.\u003c\/li\u003e\n\u003cli\u003eCompare the new element with the old one, then install it in the same orientation.\u003c\/li\u003e\n\u003cli\u003eMake sure the element is seated correctly and that the housing seal is properly positioned.\u003c\/li\u003e\n\u003cli\u003eRefit the housing cover and securely fasten the clips or bolts before starting the engine.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I know if this air filter fits my Yanmar engine?\u003c\/summary\u003e\n\u003cp\u003eCompare your complete engine model, configuration, original filter dimensions, and original part number with the information on this page. The listed applications include selected 1GM, 2GM, 3GM, 2YM, and 3YM series engines, but model names alone may not confirm the correct filter.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat are the signs of a clogged air filter?\u003c\/summary\u003e\n\u003cp\u003ePossible symptoms include reduced engine performance, increased black exhaust smoke, unusual intake noise, and reduced fuel economy. A visual inspection may show excessive dirt, oil contamination, or blocked filter media.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow often should this air filter be replaced?\u003c\/summary\u003e\n\u003cp\u003eInspect the element during regular engine maintenance and replace it when it is dirty, damaged, oil-soaked, or otherwise restricted. Replacement intervals depend on operating hours and environmental conditions; dusty or salt-laden environments may require more frequent inspection.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this an OEM Yanmar filter?\u003c\/summary\u003e\n\u003cp\u003eNo. This listing is for an aftermarket replacement air filter element. Compare the part number, dimensions, and filter construction with the original component before installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the filter include a complete air filter housing?\u003c\/summary\u003e\n\u003cp\u003eNo. The package contains one replacement air filter element only. The original housing, cover, fasteners, and any separate seals or gaskets are not included unless specifically stated.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n\u003cp\u003eTypical transit is 5–15 days depending on destination and shipping method. Available shipping options and costs are shown at checkout.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n\u003cp\u003eWarranty coverage and return eligibility are governed by the applicable order and store policies. Contact support with your order details if the item arrives damaged or appears to have a manufacturing defect.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the engine model, original part number, dimensions, and filter appearance before ordering.\u003c\/li\u003e\n\u003cli\u003eDo not operate the engine with the air filter element or housing cover improperly installed.\u003c\/li\u003e\n\u003cli\u003eReplace the element if it is damaged, deformed, contaminated, or cannot seal correctly.\u003c\/li\u003e\n\u003cli\u003eThis is an aftermarket replacement and is not represented as a genuine Yanmar component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended when the correct engine application or installation procedure is uncertain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — Replacement components selected for common marine engine service needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Fulfillment\u003c\/strong\u003e — Shipping options are available for customers in many regions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePractical Value\u003c\/strong\u003e — Aftermarket alternatives intended to provide a straightforward replacement option.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718270390587,"sku":"X8-YIFE-27L3","price":22.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/X8-YIFE-27L3.png?v=1762958704"},{"product_id":"water-pump-impeller-kit-fits-jabsco-johnson-yanmar-volvo-penta-westerbeke-replaces-jabsco-653-0001-p-johnson-09-810b-1","title":"Water Pump Impeller – Fits Jabsco, Johnson, Yanmar, Volvo Penta \u0026 Westerbeke","description":"\u003csection\u003e\n\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis flexible \u003cstrong\u003ewater pump impeller\u003c\/strong\u003e is an aftermarket replacement component for marine engine raw-water cooling pumps. It is listed as an individual impeller rather than a complete service kit and is associated with pump applications from Jabsco, Johnson, Yanmar, Volvo Penta and Westerbeke.\u003c\/p\u003e\n  \u003cp\u003eReference numbers associated with this replacement include Jabsco \u003cstrong\u003e653-0001-P\u003c\/strong\u003e and Johnson \u003cstrong\u003e09-810B-1\u003c\/strong\u003e. Always confirm the pump model, original impeller dimensions and drive configuration before ordering.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eFlexible neoprene impeller with a brass insert.\u003c\/li\u003e\n    \u003cli\u003eSix-blade design for marine water-pump applications.\u003c\/li\u003e\n    \u003cli\u003eSlotted shaft pin drive.\u003c\/li\u003e\n    \u003cli\u003eSuitable for raw-water cooling systems when the dimensions and drive match the original part.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eReference Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eThese are reference numbers associated with the product listing. A reference number alone does not confirm fitment for every pump or engine; verify the service-manual specification before installation.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Reference Number Matrix\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eReference Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e653-0001-P\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003e09-810B-1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eApplication references\u003c\/td\u003e\n\u003ctd\u003eJabsco, Johnson, Yanmar, Volvo Penta and Westerbeke marine water-pump applications\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eEngine and Pump Compatibility\u003c\/h2\u003e\n  \u003cp\u003eThis impeller is associated with a range of Jabsco and Johnson pumps and with selected Westerbeke and Yanmar marine-engine cooling applications. Engine compatibility can vary by pump model, production year, serial range and shaft configuration.\u003c\/p\u003e\n  \u003cp\u003eBefore purchase, compare the existing impeller with the specifications below and confirm the required OEM reference in the engine or pump service manual. Do not rely on engine brand or model name alone.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Compatibility Guidance\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eVerification requirement\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJabsco water pumps\u003c\/td\u003e\n\u003ctd\u003eConfirm the pump model and the Jabsco reference 653-0001-P.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson water pumps\u003c\/td\u003e\n\u003ctd\u003eConfirm the pump model and the Johnson reference 09-810B-1.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar, Volvo Penta and Westerbeke applications\u003c\/td\u003e\n\u003ctd\u003eConfirm the engine-specific pump reference, impeller dimensions and slotted shaft pin drive before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eFlexible water pump impeller\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eMarine raw-water and engine cooling pumps\u003c\/dd\u003e\n    \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eNeoprene with brass insert\u003c\/dd\u003e\n    \u003cdt\u003eBlade Count\u003c\/dt\u003e\n\u003cdd\u003e6 blades\u003c\/dd\u003e\n    \u003cdt\u003eDrive Type\u003c\/dt\u003e\n\u003cdd\u003eSlotted shaft pin drive\u003c\/dd\u003e\n    \u003cdt\u003eDiameter\u003c\/dt\u003e\n\u003cdd\u003e51 mm (2 in)\u003c\/dd\u003e\n    \u003cdt\u003eWidth\u003c\/dt\u003e\n\u003cdd\u003e22 mm (7\/8 in)\u003c\/dd\u003e\n    \u003cdt\u003eShaft Bore\u003c\/dt\u003e\n\u003cdd\u003e12 mm (15\/32 in)\u003c\/dd\u003e\n    \u003cdt\u003ePin Outside Diameter\u003c\/dt\u003e\n\u003cdd\u003e4.9 mm\u003c\/dd\u003e\n    \u003cdt\u003eApproximate Weight\u003c\/dt\u003e\n\u003cdd\u003e0.07 kg (0.15 lb)\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Flexible water pump impeller\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eThis listing is for the impeller only. O-rings, cover gaskets, keys and other pump-service components are not included unless separately stated in the order details.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eShut off the engine and close the raw-water intake seacock.\u003c\/li\u003e\n    \u003cli\u003ePlace an absorbent towel beneath the pump to catch residual water.\u003c\/li\u003e\n    \u003cli\u003eRemove the pump cover plate and retain the fasteners.\u003c\/li\u003e\n    \u003cli\u003eRemove the old impeller with suitable pliers or an impeller puller, taking care not to damage the pump housing.\u003c\/li\u003e\n    \u003cli\u003eClean the housing and inspect the cover plate, cam, shaft, key or drive pin, and sealing surfaces for wear.\u003c\/li\u003e\n    \u003cli\u003eLubricate the new impeller with glycerin or another lubricant approved for neoprene impellers. Avoid petroleum-based grease and oil.\u003c\/li\u003e\n    \u003cli\u003eInstall the impeller with the blades bent in the pump's direction of rotation.\u003c\/li\u003e\n    \u003cli\u003eReplace the cover gasket or O-ring if required by the pump manufacturer. These items are not supplied with this individual impeller.\u003c\/li\u003e\n    \u003cli\u003eReinstall the cover, open the seacock, start the engine and check immediately for leaks and proper water flow.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting and FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\u003csummary\u003eHow do I confirm that this impeller fits my engine?\u003c\/summary\u003e\u003cp\u003eCheck the engine or pump service manual for the required impeller reference. Then compare the original impeller's diameter, width, shaft bore, blade count and slotted shaft pin drive with the specifications on this page. Engine brand or model alone is not sufficient because pump configurations can vary.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat are common signs of a failing impeller?\u003c\/summary\u003e\u003cp\u003eTypical signs include engine overheating, reduced discharge-water flow, visible cracks, missing or damaged blades, or a hard and brittle rubber surface. Inspect the pump and cooling system if any of these symptoms occur.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eHow often should a water-pump impeller be replaced?\u003c\/summary\u003e\u003cp\u003eReplacement intervals depend on the engine manufacturer, operating hours, storage conditions and water quality. Follow the service schedule for your engine or pump, and inspect the impeller regularly.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhy is the new impeller difficult to install?\u003c\/summary\u003e\u003cp\u003eA close fit is normal for a flexible impeller. Apply a suitable water-soluble lubricant and bend the blades in the direction of pump rotation while inserting the impeller. Do not force an impeller with incorrect dimensions or drive details.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat lubricant should be used?\u003c\/summary\u003e\u003cp\u003eUse glycerin or another water-soluble lubricant approved for neoprene impellers. Avoid petroleum-based grease and oils because they can damage the rubber.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat if the engine still overheats after replacement?\u003c\/summary\u003e\u003cp\u003eCheck the seacock, intake strainer, hoses, heat exchanger, exhaust discharge, pump cover, cam and housing. Also verify that the impeller is rotating correctly and that no damaged blade fragments are blocking the cooling passages.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\u003cp\u003eNo. This is an aftermarket replacement impeller intended for applications using the listed reference numbers and matching dimensions. It is not manufactured by Jabsco, Johnson, Yanmar, Volvo Penta or Westerbeke.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eSafety and Important Information\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eStop the engine and close the raw-water intake before servicing the pump.\u003c\/li\u003e\n    \u003cli\u003eVerify the reference number, dimensions and drive configuration before ordering.\u003c\/li\u003e\n    \u003cli\u003eInspect the pump housing and sealing surfaces whenever the impeller is replaced.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when the cooling system or pump condition is uncertain.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — Components selected for common marine maintenance and repair applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFitment Guidance\u003c\/strong\u003e — Compare the reference number and physical specifications with the original part before purchase.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eService-Focused Support\u003c\/strong\u003e — Use the pump or engine service manual as the final authority for installation and maintenance requirements.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718272454971,"sku":"XR17FI006","price":22.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/XR17FI006.png?v=1762958780"},{"product_id":"sea-water-pump-rebuild-kit-fits-yanmar-2gm-3gm-2ym-3ym-series-replaces-yanmar-128377-42500-128397-42500","title":"Sea Water Pump Major Rebuild Kit – Fits Yanmar 2GM, 3GM, 2YM and 3YM Series (Replaces Yanmar 128377-42500, 128397-42500)","description":"\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis \u003cstrong\u003eSea Water Pump Major Rebuild Kit\u003c\/strong\u003e is designed to overhaul compatible raw-water pumps used on Yanmar marine diesel engines in the 2GM, 3GM, 2YM and 3YM families. It is intended for pumps with a 6-bolt end cover measuring approximately 76 mm (3 in) in diameter.\u003c\/p\u003e\n  \u003cp\u003eThe kit is offered as an aftermarket replacement for the applicable Yanmar and Johnson reference numbers listed below. Always compare the pump configuration, end-cover bolt pattern and component dimensions with the parts installed on your engine before ordering.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eComplete major rebuild components for a compatible Yanmar sea-water pump.\u003c\/li\u003e\n    \u003cli\u003eApplicable engine families include selected 2GM, 3GM, 2YM and 3YM models.\u003c\/li\u003e\n    \u003cli\u003eIncludes an impeller, bearings, seals, end cover, retaining hardware and stainless-steel cover screws.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cstyle\u003e\n    .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n    table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n    table.ss-table th, table.ss-table td {\n      padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n    }\n    table.ss-table th {\n      white-space:nowrap;\n      word-break:normal;\n      letter-spacing:normal;\n      font-weight:600;\n      background:#f8fafc;\n    }\n    @media (max-width:480px){\n      table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n    }\n  \u003c\/style\u003e\n\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eThese references are provided for identification and cross-reference purposes. Confirm the complete pump configuration before installation.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003ePart Number\u003c\/th\u003e\n          \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e128377-42500\u003c\/td\u003e\n\u003ctd\u003eRaw-water pump reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e128397-42500\u003c\/td\u003e\n\u003ctd\u003eRaw-water pump reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e128990-42500\u003c\/td\u003e\n\u003ctd\u003eReference listed for compatible pump applications\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e128990-42510\u003c\/td\u003e\n\u003ctd\u003eReference listed for compatible pump applications\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003e10-24509-01\u003c\/td\u003e\n\u003ctd\u003eAftermarket reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003e10-24509-02\u003c\/td\u003e\n\u003ctd\u003eReference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003e10-13337-01\u003c\/td\u003e\n\u003ctd\u003eReference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003e10-13492-01\u003c\/td\u003e\n\u003ctd\u003eReference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003e10-13328-03\u003c\/td\u003e\n\u003ctd\u003eReference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eThe cataloged pump applications include selected Yanmar 2GM, 3GM, 2YM and 3YM engines. Model suffixes and pump configurations can vary, so verify the pump part number and physical configuration on your engine before purchase.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel Family\u003c\/th\u003e\n          \u003cth\u003eStroke\u003c\/th\u003e\n          \u003cth\u003eApplicable Pump Reference\u003c\/th\u003e\n          \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GM \/ 2GM20 family\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e128377-42500\u003c\/td\u003e\n\u003ctd\u003eConfirm exact model suffix and pump configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GM \/ 3GM30 family\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e128377-42500\u003c\/td\u003e\n\u003ctd\u003eConfirm exact model suffix and pump configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2GMF family\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e128397-42500\u003c\/td\u003e\n\u003ctd\u003eConfirm exact model suffix and pump configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3GMF family\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e128397-42500\u003c\/td\u003e\n\u003ctd\u003eConfirm exact model suffix and pump configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e2YM family\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e128397-42500\u003c\/td\u003e\n\u003ctd\u003eConfirm exact model suffix and pump configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e3YM family\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e128397-42500\u003c\/td\u003e\n\u003ctd\u003eConfirm exact model suffix and pump configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n    \u003cdd\u003eSea Water Pump Major Rebuild Kit\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eReplacement rebuild components for a compatible pump\u003c\/dd\u003e\n    \u003cdt\u003eFuel Type\u003c\/dt\u003e\n    \u003cdd\u003eDiesel\u003c\/dd\u003e\n    \u003cdt\u003eConnection\u003c\/dt\u003e\n    \u003cdd\u003eDirect-mount pump application\u003c\/dd\u003e\n    \u003cdt\u003eHousing Color\u003c\/dt\u003e\n    \u003cdd\u003eBlack\u003c\/dd\u003e\n    \u003cdt\u003eEnd Cover Configuration\u003c\/dt\u003e\n    \u003cdd\u003e6-bolt cover, approximately 76 mm (3 in) diameter\u003c\/dd\u003e\n    \u003cdt\u003eImpeller Dimensions\u003c\/dt\u003e\n    \u003cdd\u003eApproximately 2 in (50.8 mm) diameter, 0.87 in (22 mm) width, 0.47 in (12 mm) shaft and 6 blades\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Water Pump Impeller (128991-42200 \/ 128990-42200)\u003c\/li\u003e\n    \u003cli\u003e1 x Pump End-Cover O-Ring (X02173476)\u003c\/li\u003e\n    \u003cli\u003e1 x Slinger O-Ring (X02173432)\u003c\/li\u003e\n    \u003cli\u003e1 x Retaining Ring (X00370012)\u003c\/li\u003e\n    \u003cli\u003e1 x Retaining Ring (X00371732)\u003c\/li\u003e\n    \u003cli\u003e1 x Spacer Plate (X0145050)\u003c\/li\u003e\n    \u003cli\u003e1 x Bearing (X03431760)\u003c\/li\u003e\n    \u003cli\u003e1 x Bearing (X03431748)\u003c\/li\u003e\n    \u003cli\u003e1 x Stainless-Steel Screw Set (X0504163)\u003c\/li\u003e\n    \u003cli\u003e1 x Lip Seal (X02233010)\u003c\/li\u003e\n    \u003cli\u003e1 x End Cover (X0142398 \/ 128990-42540)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eTurn off the engine and close the sea cock or raw-water intake valve.\u003c\/li\u003e\n    \u003cli\u003eDrain residual water from the pump and surrounding hoses.\u003c\/li\u003e\n    \u003cli\u003eLoosen the hose clamps and remove the inlet and outlet hoses from the pump.\u003c\/li\u003e\n    \u003cli\u003eRemove the pump mounting fasteners and carefully detach the pump from the engine.\u003c\/li\u003e\n    \u003cli\u003eDisassemble the pump, recording the order and orientation of the bearings, seals, retaining rings and other components.\u003c\/li\u003e\n    \u003cli\u003eClean reusable pump parts and the pump mounting surface thoroughly.\u003c\/li\u003e\n    \u003cli\u003eInstall the replacement bearings, seals, retaining rings and other kit components using suitable marine-service lubricant where required.\u003c\/li\u003e\n    \u003cli\u003eInstall the impeller, end cover and O-ring, ensuring that all sealing surfaces are clean and correctly seated.\u003c\/li\u003e\n    \u003cli\u003eTighten the cover screws evenly in a crisscross pattern and follow the engine or pump manufacturer’s torque guidance.\u003c\/li\u003e\n    \u003cli\u003eReinstall the pump, reconnect the hoses and secure all clamps.\u003c\/li\u003e\n    \u003cli\u003eOpen the sea cock, start the engine and immediately inspect the pump and hoses for leaks.\u003c\/li\u003e\n    \u003cli\u003eConfirm normal raw-water discharge and monitor engine temperature during the first operating period.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if this kit fits my engine?\u003c\/summary\u003e\n    \u003cp\u003eCheck that your engine is a compatible Yanmar 2GM, 3GM, 2YM or 3YM application and compare the pump reference, 6-bolt end-cover pattern and approximately 76 mm (3 in) cover diameter with your existing pump. Model suffixes and pump configurations vary, so do not rely on the engine family alone.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the signs that a sea-water pump needs rebuilding?\u003c\/summary\u003e\n    \u003cp\u003eCommon symptoms include water leakage from the pump, reduced raw-water flow, overheating at idle or low speed, worn impeller performance, noisy bearings and leakage around the shaft seal.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should the sea-water pump be serviced?\u003c\/summary\u003e\n    \u003cp\u003eInspect the impeller at least annually and replace it according to the engine manufacturer’s maintenance schedule and operating conditions. Rebuild the pump when leakage, bearing noise, shaft wear or reduced water flow indicates internal wear.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the difference between a major and minor rebuild kit?\u003c\/summary\u003e\n    \u003cp\u003eA minor kit generally covers routine service items such as an impeller and sealing components. This major rebuild kit is intended for a more complete overhaul and includes internal service components such as bearings, seals, retaining rings, cover hardware and an end cover.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat should I check before installation?\u003c\/summary\u003e\n    \u003cp\u003eCompare the new components with the original parts, verify the pump reference and confirm the 6-bolt cover and cover diameter. Inspect the pump housing, shaft, cam and mounting surfaces for wear or damage before reassembly.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I install this kit myself?\u003c\/summary\u003e\n    \u003cp\u003eInstallation is suitable for a person experienced with marine diesel cooling systems and precision pump assembly. If you are not confident identifying component orientation or setting seals and bearings correctly, use a qualified marine technician.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM component?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is an aftermarket replacement rebuild kit intended for the listed applications and reference numbers. It is not sold as a Yanmar genuine OEM kit.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the shipping and warranty terms?\u003c\/summary\u003e\n    \u003cp\u003eShipping availability, delivery estimates and warranty or return terms are determined by the store policies shown at checkout and on the applicable policy pages.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the pump reference, bolt pattern, dimensions and component appearance against your original parts before ordering.\u003c\/li\u003e\n    \u003cli\u003eClose the raw-water intake and allow the engine to cool before removing the pump.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement kit, not a Yanmar OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended if you are unfamiliar with marine cooling-system service.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts selected for dependable service in real-world operating conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGlobal Fulfillment\u003c\/strong\u003e — Delivery options and estimated transit times are shown during checkout.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing with attention to component quality and application details.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718272487739,"sku":"9J-5I7R-84T7","price":54.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/9J-5I7R-84T7.png?v=1762958781"},{"product_id":"air-filter-fits-yanmar-2gm-3gm-2ym-3ym-series-replaces-128270-12540-128377-12530","title":"Air Filter for Yanmar 2GM and 3GM30 Marine Diesel Engines – Replaces 128270-12540","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket \u003cstrong\u003eair filter element\u003c\/strong\u003e is intended for selected Yanmar marine diesel engines, including the \u003cstrong\u003e2GM\u003c\/strong\u003e and \u003cstrong\u003e3GM30\u003c\/strong\u003e. It replaces Yanmar OEM part number \u003cstrong\u003e128270-12540\u003c\/strong\u003e and is designed for installation in the original filter housing.\u003c\/p\u003e\n\u003cp\u003eThe verified aftermarket reference for this replacement is \u003cstrong\u003eSierra 18-57703\u003c\/strong\u003e. Always compare your original filter, engine model and housing before ordering, especially where model variants or replacement housings are involved.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Air filter element\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Yanmar marine diesel engines\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Replacement in the original air-filter housing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuel type:\u003c\/strong\u003e Diesel\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eThese are the verified reference numbers associated with this replacement air filter.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eRole\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e128270-12540\u003c\/td\u003e\n        \u003ctd\u003eOEM replacement reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-57703\u003c\/td\u003e\n        \u003ctd\u003eAftermarket reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe available catalog fitment identifies this air filter for the following Yanmar engine applications. Confirm the exact model designation and filter housing before installation.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eEngine Model\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eOEM Replacement Reference\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e2GM\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e128270-12540\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3GM30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e128270-12540\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eAir filter element\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eYanmar 2GM and 3GM30 marine diesel engines\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eReplacement in the original air-filter housing\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n  \u003cdd\u003eDiesel\u003c\/dd\u003e\n  \u003cdt\u003eReplacement Reference\u003c\/dt\u003e\n  \u003cdd\u003eYanmar 128270-12540\u003c\/dd\u003e\n  \u003cdt\u003eAftermarket Reference\u003c\/dt\u003e\n  \u003cdd\u003eSierra 18-57703\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Air filter element\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eTurn off the engine and allow it to cool before beginning work.\u003c\/li\u003e\n  \u003cli\u003eLocate the engine air-filter housing and remove its cover according to the engine service instructions.\u003c\/li\u003e\n  \u003cli\u003eRemove the existing filter element, noting its orientation and seating position.\u003c\/li\u003e\n  \u003cli\u003eClean loose dust and debris from the housing without allowing contaminants to enter the intake.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement element in the same orientation and ensure it is seated correctly.\u003c\/li\u003e\n  \u003cli\u003eRefit and secure the housing cover before operating the engine.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm that this air filter fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eConfirm that your engine is a Yanmar 2GM or 3GM30 and that the existing filter or engine documentation identifies Yanmar replacement reference 128270-12540. Compare the original filter and housing before ordering. If your engine is a different Yanmar model, do not assume fitment from the engine family name alone.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a dirty or restricted air filter?\u003c\/summary\u003e\n  \u003cp\u003ePossible symptoms include reduced engine performance, black exhaust smoke, increased fuel consumption or difficulty reaching normal operating speed. Inspect the filter for dirt, oil contamination or damage and follow the engine manufacturer's maintenance guidance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should the filter be replaced?\u003c\/summary\u003e\n  \u003cp\u003eReplacement frequency depends on operating hours and the surrounding environment. Inspect the filter at the intervals specified in your engine service manual and replace it when dirty, damaged or restricted.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs modification required?\u003c\/summary\u003e\n  \u003cp\u003eThis replacement is intended for the original air-filter housing associated with the stated application. No modification should be required when the engine model, reference number and housing match; do not force a filter that does not seat correctly.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n  \u003cp\u003eNo. This is an aftermarket replacement air filter element. Yanmar 128270-12540 is provided as the OEM replacement reference, and Sierra 18-57703 is the verified aftermarket reference.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed and cost\u003c\/summary\u003e\n  \u003cp\u003eAvailable shipping methods, delivery estimates and costs are shown at checkout and may vary by destination.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty and returns\u003c\/summary\u003e\n  \u003cp\u003eWarranty coverage and return eligibility are subject to the seller's current policies. Contact support before returning an item and provide your order details.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the engine model, existing filter and housing before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not operate the engine with the filter incorrectly seated or the housing cover unsecured.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eFollow the engine manufacturer's service and safety instructions during installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine Parts Focus\u003c\/strong\u003e — Replacement components selected for common marine service applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication Information\u003c\/strong\u003e — Product references and fitment details are provided to help with part identification.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomer Support\u003c\/strong\u003e — Contact support if you need help confirming a reference or return procedure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718272520507,"sku":"DE-22AF001","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/DE-22AF001.png?v=1762958782"}],"url":"https:\/\/seasierra.com\/collections\/yanmar-30hp-4-stroke-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}