{"title":"Yanmar 22HP 4-Stroke Marine Engine","description":"\u003csection id=\"hero\" style=\"max-width: 1100px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003cp\u003eThis page is for Yanmar 4-Stroke 22HP outboard engines. It helps you find compatible parts and essential service information, with 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.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar\" style=\"display:inline-block; padding:10px 14px; background:#005bbb; color:#fff; text-decoration:none; border-radius:4px;\"\u003eBrowse All Yanmar Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"max-width: 1100px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 22HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate location: look for the riveted ID\/serial plate on the engine block or rocker cover; some installations also include a tag on the transmission or mounting bracket. On transom-mounted units, the tag is typically on the clamp bracket.\u003c\/li\u003e\n    \u003cli\u003eReading the code: Yanmar model strings often include the series (e.g., GM, YM) and cooling designation (e.g., “F” for freshwater\/heat-exchanger cooled). Suffix letters can indicate configuration details. Record the full model and serial to confirm parts.\u003c\/li\u003e\n    \u003cli\u003ePlatform cues: compact 4-stroke diesels in this HP range may be inline-2 or inline-3. Older GM-series are known for simple indirect injection; newer YM-series run smoother and quieter.\u003c\/li\u003e\n    \u003cli\u003e4-stroke diesel specifics: no spark plugs; expect a mechanical or electric lift pump, injector lines, and a raw-water pump feeding a heat exchanger on freshwater-cooled models.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"max-width: 1100px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003ch2\u003eEngine Overview\u003c\/h2\u003e\n\n  \u003ch3\u003eSmall GM-Series Diesels (examples around this 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 #ddd; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; 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 #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInline-2 or inline-3, indirect-injection 4-stroke diesel; raw-water impeller feeding heat exchanger on freshwater-cooled “F” variants.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eExamples include 2GM20F and 3GM30F near this output class.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eRugged, simple, and widely supported; tolerant of marine conditions; easy to service with basic tools.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eExhaust elbows are a maintenance focus due to internal corrosion and carbon buildup. Air cleaner foam elements can deteriorate with oil exposure—inspect regularly.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eNewer YM-Series Diesels (examples around this 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 #ddd; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; 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 #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInline-2 or inline-3 4-stroke diesel with improved combustion and smoother operation; raw-water impeller with heat exchanger on most installations.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eExamples include 2YM20 and 3YM20 around the 20–22 HP range.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eQuieter running, good fuel efficiency, strong parts availability.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eService intervals are similar to GM-series. Continue periodic checks of the mixing elbow and raw-water impeller.\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: 1100px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for compact 4-stroke marine diesels in this HP class. Always follow the maintenance schedule and specifications in your official Yanmar service manual.\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 #ddd; padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; 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 #f7f7f7;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003eUse marine-grade diesel oil; replace spin-on filter each change.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\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 #f7f7f7;\"\u003eFuel filter(s)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003e100–200 hours or each season\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003eReplace engine-mounted element; service primary\/water-separating filter and drain water.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\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 #f7f7f7;\"\u003eAir filter\/cleaner\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003eInspect every 100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003eCheck for deteriorated foam; clean\/replace to prevent ingestion and wear.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\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:8px; border-bottom:1px solid #f7f7f7;\"\u003eRaw-water impeller\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003e1 year or 200 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003eReplace impeller; inspect cover plate and cam for scoring.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\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:8px; border-bottom:1px solid #f7f7f7;\"\u003eThermostat \u0026amp; gaskets\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003eEvery 2–3 years\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003eTest opening temp; renew gasket when serviced.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\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; border-bottom:1px solid #f7f7f7;\"\u003eAnodes (where fitted)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003eInspect 3–6 months\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003eCheck exchanger, saildrive\/gearbox, and bonding system; replace when 50% consumed.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\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 #f7f7f7;\"\u003eTransmission\/Saildrive oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003e100–200 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\u003eChange oil; inspect magnetic drain plug for metal fines.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f7f7f7;\"\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:8px;\"\u003eExhaust mixing elbow\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect every 1–2 years\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCheck for internal corrosion or carbon clogging; replace if restricted or leaking.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-elbows\"\u003eYanmar Elbows\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eDrive\/alternator belt\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect every 100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCheck tension and cracking; replace if glazed or frayed.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp style=\"font-size:12px; color:#555;\"\u003e*Intervals are typical for this class; confirm requirements for your exact model and duty cycle.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"max-width: 1100px; margin: 0 auto; padding: 16px;\"\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; Filtration — \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\u003eAir \u0026amp; Intake — \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar-air-filters\"\u003eYanmar Air Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling \u0026amp; Impellers — \u003ca href=\"https:\/\/seasierra.com\/collections\/impellers\"\u003eImpellers\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    \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  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"max-width: 1100px; 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 #ddd; padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; 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 #f0f0f0;\"\u003eWeak water stream or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInspect intake screen\/strainer, raw-water impeller, hoses, and thermostat; check for blocked mixing elbow.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eWater pump impeller kit, thermostat, hoses, mixing elbow.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eConfirm clean fuel, bleed air from lines, replace fuel filters; check cold-start aids where equipped and injector condition.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eFuel filters, lift pump, injectors, air filter.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eLook for clogged air filter, restricted exhaust elbow, fouled fuel filters, or prop\/drive fouling.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eAir filter, fuel filter, exhaust elbow.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eExcessive smoke under load\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eBlack: air restriction or over-propped; White: cold combustion\/air in fuel; Blue: oil consumption. Inspect filters, timing, and injectors.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eAir filter, injectors, fuel filter, crankcase ventilation service.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGearbox noise or metal on drain plug\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eVerify oil level\/condition, alignment, and mount integrity; service on schedule.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGear oil, seals\/gaskets, engine mounts.\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: 1100px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between GM- and YM-series engines?\u003c\/summary\u003e\n    \u003cp\u003eSome service items look similar but differ in size or thread (filters, belts, elbows). Always match parts using the full model designation and serial number to ensure compatibility.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the raw-water impeller?\u003c\/summary\u003e\n    \u003cp\u003eAnnually or every 200 hours is a common guideline. Replace sooner if the tell-tale weakens, the pump ingested debris, or the engine overheated.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should transmission or saildrive oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eTypically every 100–200 hours or annually. Inspect for water intrusion and check the magnetic drain plug for metal fines at each service.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do I need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the full Yanmar model code, serial number, cooling type (raw-water vs. freshwater\/heat exchanger), and photos of the nameplate and the part you’re replacing.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"max-width: 1100px; margin: 0 auto; padding: 16px;\"\u003e\n  \u003cp\u003eReady to find the right parts by horsepower, year, and model? Browse our main Yanmar collection.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yanmar\" style=\"display:inline-block; padding:10px 14px; background:#005bbb; color:#fff; text-decoration:none; border-radius:4px;\"\u003eBrowse All Yanmar Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; font-size:12px; color:#555;\"\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":"front-seal-cover-gasket-fits-yanmar-1gm-1gm10-2gm-3gm-series-replaces-121575-01510-121575-01511-121575-01512-128170-01510-128170-01511","title":"Front Seal Cover Gasket – Fits Yanmar 1GM, 1GM10, 2GM, 3GM Series (Replaces 121575-01510, 121575-01511, 121575-01512, 128170-01510, 128170-01511)","description":"\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; word-break:normal; letter-spacing:normal; font-weight:600; 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 high-quality \u003cstrong\u003eFront Seal Cover Gasket\u003c\/strong\u003e is engineered for a precise fit on Yanmar Marine 1GM, 1GM10, 2GM, and 3GM series 1- and 2-cylinder diesel engines manufactured between 1977 and 2010. It creates a reliable seal between the front cover and the engine block, preventing oil leaks.\u003c\/p\u003e\n  \u003cp\u003eThis part is a direct replacement for Yanmar OEM part number series 121575-xxxxx (121575-01510, 121575-01511, 121575-01512) and 128170-xxxxx (128170-01510, 128170-01511).\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eInstalls via surface mounting with fasteners.\u003c\/li\u003e\n    \u003cli\u003eMade from durable composite gasket material suitable for diesel engines.\u003c\/li\u003e\n    \u003cli\u003eEnsures a secure, leak-free seal for the engine's front cover assembly.\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 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\u003e121575-01510 \/ -01511 \/ -01512\u003c\/td\u003e\n          \u003ctd\u003eFits 1GM, 1GMY-C, 2GM, and 3GM series engines.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e128170-01510 \/ -01511\u003c\/td\u003e\n          \u003ctd\u003eFits 1GM10 and 1GM10L models.\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 to ensure correct fitment.\u003c\/p\u003e\n  \u003cp\u003e\u003cb\u003eFor Yanmar Marine Engines:\u003c\/b\u003e This gasket fits several 1, 2, and 3-cylinder 4-stroke models. Note that two different part number series apply depending on your specific engine model.\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\u003e7\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1977–1990\u003c\/td\u003e\n          \u003ctd\u003e121575-01510\/121575-01511\/121575-01512\u003c\/td\u003e\n          \u003ctd\u003eAlso fits 1GM-L\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e1GMY-C\u003c\/td\u003e\n          \u003ctd\u003e7\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1980–1990\u003c\/td\u003e\n          \u003ctd\u003e121575-01510\/121575-01511\/121575-01512\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\u003e9\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1981–2005\u003c\/td\u003e\n          \u003ctd\u003e128170-01510\/128170-01511\u003c\/td\u003e\n          \u003ctd\u003eLater model uses different part number\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e1GM10L\u003c\/td\u003e\n          \u003ctd\u003e9\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1981–2005\u003c\/td\u003e\n          \u003ctd\u003e128170-01510\/128170-01511\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\u003e1980–2003\u003c\/td\u003e\n          \u003ctd\u003e121575-01510\/121575-01511\/121575-01512\u003c\/td\u003e\n          \u003ctd\u003eIncludes 2GM20F, 2GM20F-YEU, 2GM20-YEU\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\u003e1980–2000\u003c\/td\u003e\n          \u003ctd\u003e121575-01510\/121575-01511\/121575-01512\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYanmar\u003c\/td\u003e\n          \u003ctd\u003e2GMSZK\u003c\/td\u003e\n          \u003ctd\u003e18\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1980–2000\u003c\/td\u003e\n          \u003ctd\u003e121575-01510\/121575-01511\/121575-01512\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\u003e22\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1980–1985\u003c\/td\u003e\n          \u003ctd\u003e121575-01510\/121575-01511\/121575-01512\u003c\/td\u003e\n          \u003ctd\u003eIncludes 3GM-D and 3GM-F variants\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\u003e1983–2005\u003c\/td\u003e\n          \u003ctd\u003e121575-01510\/121575-01511\/121575-01512\u003c\/td\u003e\n          \u003ctd\u003eIncludes 3GM30F and 3GM30F-YEU variants\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\u003eFront Seal Cover Gasket\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eSurface mount with fasteners\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\u003eComposite gasket material\u003c\/dd\u003e\n    \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e32.0\" L × 16.0\" W × 0.1\" H\u003c\/dd\u003e\n    \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003eVaries by aftermarket brand; typically 6 months or more.\u003c\/dd\u003e\n    \u003cdt\u003eOther Attributes\u003c\/dt\u003e\n\u003cdd\u003eUsed between the front cover and engine block.\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 Front Seal Cover Gasket\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\u003eDisconnect the negative battery terminal for safety.\u003c\/li\u003e\n    \u003cli\u003eDrain the engine oil and coolant completely into appropriate containers.\u003c\/li\u003e\n    \u003cli\u003eRemove any components obstructing access to the front engine cover.\u003c\/li\u003e\n    \u003cli\u003eCarefully unfasten and remove the front cover.\u003c\/li\u003e\n    \u003cli\u003eRemove the old gasket. Thoroughly clean both mating surfaces on the engine block and cover, ensuring they are free of old material, oil, and debris.\u003c\/li\u003e\n    \u003cli\u003ePosition the new gasket correctly, aligning all bolt holes.\u003c\/li\u003e\n    \u003cli\u003eReinstall the front cover and tighten the fasteners in a staggered sequence to the manufacturer's recommended torque specifications.\u003c\/li\u003e\n    \u003cli\u003eRefill the engine with fresh oil and coolant.\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\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know which part number series (121575- vs 128170-) is right for my engine?\u003c\/summary\u003e\n    \u003cp\u003eThe 128170-series (128170-01510, 128170-01511) is specifically for the 1GM10 and 1GM10L models. The 121575-series fits the older 1GM as well as the 2GM and 3GM series engines. Please check our compatibility table and verify your engine model before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are common signs of a failing front seal cover gasket?\u003c\/summary\u003e\n    \u003cp\u003eThe most common symptom is a persistent oil leak from the front of the engine, particularly around the seam where the front cover meets the engine block. You may notice oil drips under the engine or an oily film on the surrounding components.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShould I apply sealant to this gasket during installation?\u003c\/summary\u003e\n    \u003cp\u003eGenerally, this type of gasket is designed to be installed dry without any additional sealant. However, always consult your Yanmar engine's official service manual for model-specific instructions, as recommendations can vary.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I reuse my old gasket if it looks okay?\u003c\/summary\u003e\n    \u003cp\u003eNo. Gaskets are single-use components that compress and deform to create a seal. Reusing an old gasket will almost certainly result in leaks. Always use a new gasket during reassembly.\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 9001 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 and specifications against 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\u003cb\u003ePro-Grade Standards\u003c\/b\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eFast Global Fulfillment\u003c\/b\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eManufacturer-Direct Value\u003c\/b\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":50626124382523,"sku":"128170-01510","price":99.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/128170-01510_d5d82929-767f-48bd-805a-47f6b56a61cb.jpg?v=1759816351"}],"url":"https:\/\/seasierra.com\/collections\/yanmar-22hp-4-stroke-marine-engine.oembed","provider":"SeaSierra","version":"1.0","type":"link"}