{"title":"Yanmar 35HP 4-Stroke Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page is for Yanmar 4‑Stroke 35HP outboard engines. It helps you find compatible parts and service information, including maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Yanmar collection. Scroll to the bottom of the page to start browsing parts for this engine, and 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; margin-top:8px; padding:10px 14px; background:#0d6efd; 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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 35HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate\/serial plate: Usually on the engine block or flywheel housing; if equipped with a saildrive, a second label may be on the upper gearcase.\u003c\/li\u003e\n    \u003cli\u003eReading the model code: Yanmar small 3‑cylinder engines use codes like 3YM or 3JH with suffixes that can denote drive type (KM gearbox or SD saildrive), panel\/electronics, and revision. The serial number determines exact build options.\u003c\/li\u003e\n    \u003cli\u003ePlatform differences: 4‑stroke diesel models may be mechanically injected (e.g., 3YM family) or common‑rail (e.g., newer 3JH family). Common‑rail engines have an ECU and high‑pressure rail\/sensor on the cylinder head.\u003c\/li\u003e\n    \u003cli\u003eShaft\/drive identification: Shaft‑drive engines pair to KM gearboxes; saildrive boats use SD units (e.g., SD60). Parts for the seawater pump, anodes, and prop\/drive seals vary by drive type.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eEngine\/Platform Overview\u003c\/h2\u003e\n  \u003ch3 style=\"margin-top:12px;\"\u003e3‑cylinder mechanical‑injection (approx. 30–35 HP class)\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 #e5e7eb; padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInline‑3, 4‑stroke diesel with mechanical fuel injection; freshwater cooling via heat exchanger; belt‑driven seawater pump.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e3‑cylinder Yanmar models in the 25–35 HP class (e.g., 3YM\/3GM families). Verify exact model and serial for parts.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eSimple, proven design; easy routine service; broad global parts support.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eService seawater impeller annually; inspect exhaust mixing elbow and heat‑exchanger anodes; saildrive units (if fitted) require dedicated gear oil and anodes.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3 style=\"margin-top:18px;\"\u003e3‑cylinder common‑rail (CR) 4‑stroke (approx. 35–40 HP)\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 #e5e7eb; padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInline‑3, 4‑stroke diesel with high‑pressure common‑rail and ECU; freshwater cooling; belt‑driven seawater pump.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e3JH family (e.g., 3JH40). Confirm by model\/serial, control panel, and drive type for exact part fit.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eSmooth running, improved fuel efficiency, integrated diagnostics.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eUse the correct CR‑rated fuel filters; keep electrical connectors clean\/dry; follow ECU battery voltage requirements.\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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines commonly used in the field. Always follow the service schedule and specifications in your official Yanmar manual for your exact model and drive.\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 #e5e7eb; padding:6px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eUse marine diesel‑rated oil; change hot; replace crush washer if applicable.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\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:6px;\"\u003eFuel filter (secondary on engine)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e200 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003ePre‑fill with clean diesel where specified; bleed system after service.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\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:6px;\"\u003ePrimary fuel\/water separator (hull side)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect every 50 hours; service annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eDrain water as needed; replace element at least annually.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eSeawater pump impeller\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e100–200 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect cover and wear plate; replace sooner if flow weak or after dry‑run.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/impellers\"\u003eImpellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eHeat‑exchanger\/saildrive anodes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect every 50 hours; replace when 50% wasted\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCritical for corrosion protection in brackish\/salt water.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\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:6px;\"\u003eDrive gear oil (saildrive, if equipped)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFirst 100 hours, then annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCheck for water intrusion (milky oil); renew sealing washers.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-service-maintenance-kits\"\u003eYanmar Service \u0026amp; Maintenance Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eV‑belt (alternator\/pump)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect every 100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCheck tension and cracks; replace if glazed or frayed.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAir filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect every 100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eReplace sooner in dusty or engine‑room lint conditions.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-air-filters\"\u003eYanmar Air Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eThermostat \u0026amp; gasket\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery 2 years (typical)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eReplace if overheat issues persist after impeller service.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-gaskets\"\u003eYanmar Gaskets\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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service Kits — \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-service-maintenance-kits\"\u003eYanmar Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eOil \u0026amp; Filters — \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-oil-filters\"\u003eYanmar Oil Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System — \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-fuel-filters\"\u003eYanmar Fuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System (pumps \u0026amp; impellers) — \u003ca href=\"https:\/\/seasierra.com\/collections\/water-pumps\"\u003eWater Pumps\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eExhaust Mixing Elbows — \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-elbows\"\u003eYanmar Elbows\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eElectrical \u0026amp; Sensors — \u003ca href=\"https:\/\/seasierra.com\/collections\/sensors\"\u003eSensors\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eStarting\/Charging — \u003ca href=\"https:\/\/seasierra.com\/collections\/starters\"\u003eStarters\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"margin-top:24px;\"\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 #e5e7eb; padding:6px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:6px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eWeak water stream or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect intake screen, hoses, and tell‑tale; check impeller and thermostat; verify anodes are intact.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eWater pump\/impeller kit, thermostat, intake screen, anodes\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCheck for clogged fuel filters or air filter; inspect exhaust mixing elbow for carbon\/salt restriction; confirm clean prop.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFuel filters, air filter, exhaust mixing elbow, hoses\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eVerify battery voltage and cranking speed; bleed air from fuel system after any service; on CR models, check sensor connections.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFuel filters, electrical items\/connectors, starter, sensors\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eMilky gear oil or gear noise (saildrive)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eLook for water intrusion at shaft seals; renew oil and re‑inspect; verify anodes are present and sized correctly.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eLower unit\/seal kit, anodes, gear oil service items\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eSooty exhaust or smoke under load\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCheck air filter for restriction; inspect turbo\/charge‑air hoses (if fitted); confirm clean fuel and correct prop load.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAir filter, hoses\/clamps, injectors\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=\"margin-top:24px;\"\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 Yanmar service parts are used across families, but filters, belts, sensors, and exhaust elbows often change by model revision, control panel, and drive (KM gearbox vs SD saildrive). Always confirm by model and serial number.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the seawater impeller?\u003c\/summary\u003e\n    \u003cp\u003eReplace the impeller every 100–200 hours or annually (whichever comes first). Replace immediately if the water stream is weak, the pump has run dry, or pieces are missing from the vanes.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should saildrive gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eTypically at 100 hours for the initial change, then annually. Inspect for water intrusion and renew sealing washers as required. Follow the specific interval and oil spec in your Yanmar manual.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003ePlease provide the engine model code, full serial number, drive type (KM gearbox or SD saildrive), and any control panel\/electronics details. 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=\"margin-top:24px; padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eReady to source parts by horsepower, year, and model? Browse the main Yanmar collection and use Filter \u0026amp; Sort to narrow by the items you need.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar\" style=\"display:inline-block; margin:8px 0; padding:10px 14px; background:#0d6efd; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Yanmar Parts\u003c\/a\u003e\n  \u003cp style=\"font-size:0.95em; color:#374151;\"\u003eIf you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"cylinder-head-gasket-fits-yanmar-3hm-series-replaces-121575-01334","title":"Cylinder Head Gasket – Fits Yanmar 3HM Series (Replaces 121575-01334)","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\u003eCylinder Head Gasket\u003c\/strong\u003e is a direct replacement for Yanmar 3HM series marine diesel engines. It is designed to fit 3-cylinder, 35 HP, 4-stroke models including the 3HM, 3HMF, 3HM35, and 3HM35F manufactured between 1981–1988.\u003c\/p\u003e\n\u003cp\u003eIt directly replaces Yanmar OEM part numbers 121575-01334, 121575-01333, 121575-01332, and 121575-01331.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEngineered for direct OEM-equivalent installation.\u003c\/li\u003e\n  \u003cli\u003eDesigned for use in marine diesel engine environments.\u003c\/li\u003e\n  \u003cli\u003eConstructed from high-quality, non-asbestos composite materials.\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 suppliers.\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\u003e121575-01334\u003c\/td\u003e\n        \u003ctd\u003eCurrent Replacement\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e121575-01333\u003c\/td\u003e\n        \u003ctd\u003eSuperseded by 121575-01334\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e121575-01332\u003c\/td\u003e\n        \u003ctd\u003eSuperseded by 121575-01333\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e121575-01331\u003c\/td\u003e\n        \u003ctd\u003eSuperseded by 121575-01332\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 and 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\u003e3HM\u003c\/td\u003e\n        \u003ctd\u003e35\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1981–1988\u003c\/td\u003e\n        \u003ctd\u003e121575-01334\u003c\/td\u003e\n        \u003ctd\u003eOriginal superseded: 121575-01331\/121575-01332\/121575-01333\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3HMF\u003c\/td\u003e\n        \u003ctd\u003e35\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1981–1988\u003c\/td\u003e\n        \u003ctd\u003e121575-01334\u003c\/td\u003e\n        \u003ctd\u003eOriginal superseded: 121575-01331\/121575-01332\/121575-01333\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3HM35\u003c\/td\u003e\n        \u003ctd\u003e35\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1981–1988\u003c\/td\u003e\n        \u003ctd\u003e121575-01334\u003c\/td\u003e\n        \u003ctd\u003eOriginal superseded: 121575-01331\/121575-01332\/121575-01333\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYanmar\u003c\/td\u003e\n        \u003ctd\u003e3HM35F\u003c\/td\u003e\n        \u003ctd\u003e35\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1981–1988\u003c\/td\u003e\n        \u003ctd\u003e121575-01334\u003c\/td\u003e\n        \u003ctd\u003eOriginal superseded: 121575-01331\/121575-01332\/121575-01333\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 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\u003eComposite with metal reinforcement\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e33.0\" L x 18.0\" W x 0.5\" H\u003c\/dd\u003e\n  \u003cdt\u003eOther Attributes\u003c\/dt\u003e\n\u003cdd\u003eNon-asbestos material, meets OEM specifications\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\u003c\/span\u003e x Cylinder Head Gasket (Replaces \u003cspan style=\"color:#d0021b;\"\u003e121575-01334\u003c\/span\u003e)\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 exhaust manifold, intake manifold, 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 tightening sequence.\u003c\/li\u003e\n  \u003cli\u003eCarefully lift the cylinder head off the engine block and remove the old head gasket.\u003c\/li\u003e\n  \u003cli\u003eThoroughly clean both the cylinder head and engine block surfaces, ensuring they are free of old gasket material, oil, and debris.\u003c\/li\u003e\n  \u003cli\u003ePosition the new head gasket correctly on the engine block; do not use any sealant unless specified by the engine manual.\u003c\/li\u003e\n  \u003cli\u003eCarefully place the cylinder head back onto the block.\u003c\/li\u003e\n  \u003cli\u003eInstall and torque the head bolts in the correct sequence and stages as per the Yanmar service manual.\u003c\/li\u003e\n  \u003cli\u003eReassemble all other components in the reverse order of removal.\u003c\/li\u003e\n  \u003cli\u003eRefill the cooling system, reconnect the battery, and start the engine to check for 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 confirm this gasket fits my specific engine?\u003c\/summary\u003e\n  \u003cp\u003eThis gasket is for Yanmar 3HM series engines (3HM, 3HMF, 3HM35, 3HM35F) from 1981–1988. The most reliable way to confirm fitment is to match your existing part number to one of the cross-reference numbers listed: 121575-01334, 121575-01333, 121575-01332, or 121575-01331.\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 include engine overheating, white smoke from the exhaust (coolant burning), milky or frothy engine oil (coolant mixing with oil), loss of compression, and poor engine performance. If you notice any of these signs, inspect the head gasket immediately.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this gasket made from the same material as the OEM part?\u003c\/summary\u003e\n  \u003cp\u003eThis is an aftermarket gasket made from a high-quality, non-asbestos composite with metal reinforcement, designed to meet or exceed original equipment specifications for sealing performance and durability in a marine environment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShould I use sealant when installing this gasket?\u003c\/summary\u003e\n  \u003cp\u003eGenerally, modern head gaskets like this one are designed to be installed dry. Applying sealant can interfere with the seal and cause premature failure. Always follow the specific instructions in your engine's service manual.\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":50626125037883,"sku":"121575-01334","price":64.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/121575-01334_c7ffb643-e357-45b3-a522-3b8c8c7eb284.jpg?v=1759816380"},{"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"}],"url":"https:\/\/seasierra.com\/collections\/yanmar-35hp-4-stroke-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}