{"title":"Yamaha 4-Stroke Outboard Engine 20-40HP Parts","description":"\u003csection id=\"hero\" style=\"padding:16px;border:1px solid #e5e7eb;border-radius:8px;max-width:1100px;\"\u003e\n  \u003cp\u003eThis page is for Yamaha 4-Stroke Outboard Engine 20-40HP models. Use it to find compatible parts and practical service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse the main Yamaha collection. Scroll to the bottom of this page to start browsing parts for this engine, and on the collection page use the Filter \u0026amp; Sort controls to narrow by horsepower, year range, and part category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha\" style=\"display:inline-block;margin-top:8px;padding:10px 14px;background:#0d5efd;color:#fff;text-decoration:none;border-radius:6px;\"\u003eBrowse All Yamaha Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px;max-width:1100px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 20–40HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate location: Look for the identification plate on the transom bracket (starboard side) or on the swivel bracket. It lists model code, serial number, and shaft length.\u003c\/li\u003e\n    \u003cli\u003eModel code basics: \"F\" denotes 4‑Stroke; \"T\" indicates High Thrust variants. Suffix letters often indicate trim\/tilt and start type (e.g., T = power trim \u0026amp; tilt), while H\/R can denote tiller vs. remote controls.\u003c\/li\u003e\n    \u003cli\u003eShaft length letters: S ≈ 15\", L ≈ 20\", X ≈ 25\", U ≈ 30\". Match the shaft length when selecting propellers, water pump kits, and lower unit parts.\u003c\/li\u003e\n    \u003cli\u003eYear code: A trailing letter frequently encodes model year. Always confirm the full model code and serial when verifying part compatibility.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"platforms\" style=\"padding:16px;max-width:1100px;\"\u003e\n  \u003ch2\u003eEngine\/Platform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003e20–25HP 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;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003eInline-2 SOHC 4‑Stroke, carbureted on older units and EFI on many later models.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eF20, F25 series; select High Thrust variants (e.g., T25) for heavy loads.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eLightweight package with strong mid‑range torque and very good fuel economy.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eConfirm control type (tiller vs. remote), shaft length (S\/L\/X), and trim\/tilt options when choosing rigging and lower unit components.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003e30–40HP 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;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003eInline-3 4‑Stroke, typically carbureted on early production and EFI on later models.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eF30, F40 series across S\/L\/X shaft lengths and multiple control options.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eSmooth operation, low vibration, and reliable power for pontoons, skiffs, and light workboats.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eMatch parts by full model code and year code letter. Propeller pitch and hub fit vary by gearcase and shaft length.\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=\"padding:16px;max-width:1100px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for 4‑Stroke Yamaha mid‑range outboards. Always follow the official service manual for your exact model and operating 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 #e5e7eb;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd\u003eFirst 20 hrs, then every 100 hrs or annually\u003c\/td\u003e\n        \u003ctd\u003eUse NMMA FC‑W oil and correct filter for your model\/year.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-service-maintenance-kits\"\u003eYamaha Service \u0026amp; Maintenance Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hrs or annually\u003c\/td\u003e\n        \u003ctd\u003eInspect for water intrusion or metal flakes when draining.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-lower-unit-seal-kits\"\u003eYamaha Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd\u003eInspect every 100 hrs; replace as needed (often 200–300 hrs)\u003c\/td\u003e\n        \u003ctd\u003eGap and heat range must match your engine spec.\u003c\/td\u003e\n        \u003ctd\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\u003eFuel filter \/ water-separating filter\u003c\/td\u003e\n        \u003ctd\u003eInspect every 50–100 hrs; replace at least annually\u003c\/td\u003e\n        \u003ctd\u003eEFI models are sensitive to debris; replace sooner if contaminated fuel is suspected.\u003c\/td\u003e\n        \u003ctd\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\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd\u003eEvery 2 seasons or 200 hrs (inspect annually)\u003c\/td\u003e\n        \u003ctd\u003eEssential for cooling; replace sooner if weak tell‑tale stream or overheat alarms occur.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-water-pump-repair-kits\"\u003eYamaha Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAnodes (corrosion protection)\u003c\/td\u003e\n        \u003ctd\u003eInspect every 50 hrs or quarterly; replace when ~50% depleted\u003c\/td\u003e\n        \u003ctd\u003eUse the correct alloy for your waters (fresh, brackish, or salt).\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-anodes\"\u003eYamaha Anodes\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=\"padding:16px;max-width:1100px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-service-maintenance-kits\"\u003eYamaha Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System: \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-water-pump-repair-kits\"\u003eYamaha Water Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection: \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-anodes\"\u003eYamaha Anodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition: \u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System: \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion: \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-propellers\"\u003eYamaha Propellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-lower-unit-seal-kits\"\u003eYamaha Lower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px;max-width:1100px;\"\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;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eWeak tell‑tale stream or overheat alarm\u003c\/td\u003e\n        \u003ctd\u003eInspect intake screens for debris; verify impeller condition; confirm thermostat operation.\u003c\/td\u003e\n        \u003ctd\u003eWater pump repair kit, thermostat, intake screen\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd\u003eCheck propeller for damage\/cavitation; inspect fuel filter and primer bulb; verify plug condition.\u003c\/td\u003e\n        \u003ctd\u003ePropeller, fuel filter, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd\u003eConfirm battery state of charge; inspect spark plugs; check for stale fuel or air leaks at fuel lines.\u003c\/td\u003e\n        \u003ctd\u003eSpark plugs, fuel filter, fuel line\/primer bulb, starter\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd\u003eDrain and inspect gear oil; check prop shaft for fishing line; verify seals for leaks.\u003c\/td\u003e\n        \u003ctd\u003eLower unit seal kit, bearings, gear lube\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=\"padding:16px;max-width:1100px;\"\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\u003eSometimes, but not always. Yamaha model codes encode platform, year, shaft length, and controls. Match parts to the full model\/serial and verify fitment before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule of thumb, replace every two seasons or about 200 hours, and sooner if you notice a weak tell‑tale or any overheat indication.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change lower unit gear oil?\u003c\/summary\u003e\n    \u003cp\u003eEvery 100 hours or annually, and always after any suspected impact or water intrusion. Check for milky oil or metal on the drain plug magnet.\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 model code, serial number, shaft length (S\/L\/X\/U), control type (tiller or remote), and any visible option codes from the nameplate.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px;max-width:1100px;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year, and model? Browse the main Yamaha collection to locate the right components for your 20–40HP 4‑Stroke outboard.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha\" style=\"display:inline-block;margin:8px 0 6px;padding:10px 14px;background:#0d5efd;color:#fff;text-decoration:none;border-radius:6px;\"\u003eShop Yamaha Parts\u003c\/a\u003e\n  \u003cp style=\"color:#555;\"\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":"carburetor-repair-kit-fits-yamaha-mercury-mariner-25hp-40hp-4-stroke-outboards-replaces-65w-w0093-02-00-65w-w0093-01-00","title":"Carburetor Repair Seal Kit for Yamaha F25, T25, F30, F40 and F40B; Mercury\/Mariner 4-Stroke Outboards","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 \u003cstrong\u003ecarburetor repair seal kit\u003c\/strong\u003e is designed for selected Yamaha, Mercury and Mariner 4-stroke outboards. It is intended to help restore proper carburetor sealing and fuel-system operation when original gaskets, seals or related service components have become worn or damaged.\u003c\/p\u003e\n\u003cp\u003eThe company fitment records identify this kit for Yamaha Marine F25 and T25 models from 2004–2006, F30 models from 2000 onward, and F40\/F40B models from 2000 onward. The records also identify Mercury\/Mariner 4-stroke applications including 25 HP, 30 HP carbureted 3-cylinder, 40 HP carbureted 3- and 4-cylinder, and 50 HP and 60 HP 4-cylinder outboards.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCarburetor repair seal kit for selected marine outboard applications.\u003c\/li\u003e\n  \u003cli\u003eAftermarket replacement for the listed OEM reference numbers.\u003c\/li\u003e\n  \u003cli\u003eFitment depends on the exact engine model, configuration and serial-number range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOEM Reference Numbers\u003c\/h2\u003e\n\u003cp\u003eUse the reference numbers below together with your engine model and carburetor configuration when checking compatibility. These numbers are reference identifiers only; they do not mean that every engine using one brand's part number is automatically compatible with every other application.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"OEM Reference Numbers\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eOEM Reference\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e65W-W0093-02\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e65W-W0093-01\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e67C-W0093-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n        \u003ctd\u003e8542561\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 the full model designation, stroke type, carburetor configuration and serial-number range against your service manual before ordering. The following applications are the fitment descriptions provided for this product.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Yamaha Engine Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel or Application\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears or Range\u003c\/th\u003e\n        \u003cth\u003eOEM Reference\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF25\u003c\/td\u003e\n        \u003ctd\u003e25\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2004–2006\u003c\/td\u003e\n        \u003ctd\u003e65W-W0093-02, 65W-W0093-01, 67C-W0093-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eT25\u003c\/td\u003e\n        \u003ctd\u003e25\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2004–2006\u003c\/td\u003e\n        \u003ctd\u003e65W-W0093-02, 65W-W0093-01, 67C-W0093-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF30\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2000 onward\u003c\/td\u003e\n        \u003ctd\u003e65W-W0093-02, 65W-W0093-01, 67C-W0093-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF40 \/ F40B\u003c\/td\u003e\n        \u003ctd\u003e40\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2000 onward\u003c\/td\u003e\n        \u003ctd\u003e65W-W0093-02, 65W-W0093-01, 67C-W0093-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Mercury and Mariner Engine Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eApplication\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eConfiguration\u003c\/th\u003e\n        \u003cth\u003eOEM Reference\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n        \u003ctd\u003e4-stroke outboards\u003c\/td\u003e\n        \u003ctd\u003e25\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eApplication-specific; confirm model and serial range\u003c\/td\u003e\n        \u003ctd\u003e8542561\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n        \u003ctd\u003e30 HP carbureted\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e3-cylinder carbureted models\u003c\/td\u003e\n        \u003ctd\u003e8542561\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n        \u003ctd\u003e40 HP carbureted\u003c\/td\u003e\n        \u003ctd\u003e40\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e3- or 4-cylinder carbureted models\u003c\/td\u003e\n        \u003ctd\u003e8542561\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n        \u003ctd\u003e4-cylinder outboards\u003c\/td\u003e\n        \u003ctd\u003e50–60\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eConfirm the exact carburetor application before ordering\u003c\/td\u003e\n        \u003ctd\u003e8542561\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eCarburetor repair seal kit\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eSelected Yamaha, Mercury and Mariner 4-stroke outboard carburetors\u003c\/dd\u003e\n  \u003cdt\u003eReplacement Type\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eService installation; exact procedure depends on the engine and carburetor model\u003c\/dd\u003e\n  \u003cdt\u003eFuel System\u003c\/dt\u003e\n  \u003cdd\u003eGasoline carburetor service application\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cp\u003eThe company catalog identifies this product as a carburetor repair seal kit but does not provide a verified component-by-component package list or quantities. Do not assume that the kit includes a complete carburetor, every internal carburetor component, or parts for multiple carburetors. Compare the supplied parts with the original components before installation.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eUse the engine service manual to confirm the model, stroke type, carburetor configuration and serial-number range.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery and shut off or disconnect the fuel supply before beginning service.\u003c\/li\u003e\n  \u003cli\u003eRemove the airbox or silencer and carburetor only as directed by the service manual.\u003c\/li\u003e\n  \u003cli\u003eRecord the positions of fuel lines, linkages, hoses and adjustment components before disassembly.\u003c\/li\u003e\n  \u003cli\u003eDisassemble the carburetor on a clean workbench and retain the original parts until the replacement parts have been matched.\u003c\/li\u003e\n  \u003cli\u003eClean the carburetor body, jets and passages with an appropriate carburetor cleaner. Do not damage precision openings or sealing surfaces.\u003c\/li\u003e\n  \u003cli\u003eInstall the new seals and gaskets in the correct locations. Do not reuse damaged or hardened sealing components.\u003c\/li\u003e\n  \u003cli\u003eReassemble the carburetor and reinstall it with the correct tightening procedure from the service manual.\u003c\/li\u003e\n  \u003cli\u003eSet float height, idle speed and any mixture adjustments only to the specifications for the exact engine model.\u003c\/li\u003e\n  \u003cli\u003ePrime the fuel system, inspect for leaks and test the engine in a safe, well-ventilated area.\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 kit fits my engine?\u003c\/summary\u003e\u003cp\u003eMatch your engine's brand, exact model, horsepower, 4-stroke designation, carburetor configuration and serial-number range with the fitment information above and your service manual. Also compare the carburetor's existing reference number with the listed OEM references.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhich Yamaha engines are listed for this kit?\u003c\/summary\u003e\u003cp\u003eThe company fitment records list Yamaha F25 and T25 models for 2004–2006, F30 models from 2000 onward, and F40\/F40B models from 2000 onward.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhich Mercury and Mariner engines are listed?\u003c\/summary\u003e\u003cp\u003eThe company fitment records list selected 4-stroke 25 HP engines, 30 HP carbureted 3-cylinder engines, 40 HP carbureted 3- and 4-cylinder engines, and 50 HP and 60 HP 4-cylinder engines. Exact model and serial-number verification is still required.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes one kit service every carburetor on a multi-carburetor engine?\u003c\/summary\u003e\u003cp\u003eThe company catalog does not specify the number of carburetors or a component quantity for this product. Check your engine's service manual and compare the required parts before ordering; additional kits may be required for multiple carburetors.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat symptoms may indicate worn carburetor seals?\u003c\/summary\u003e\u003cp\u003ePossible symptoms include hard starting, unstable idling, stalling, fuel leakage or poor acceleration. These symptoms can also result from clogged passages, incorrect adjustment, ignition faults or fuel-system problems, so diagnose the engine before replacing parts.\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 seal kit intended for the applications and OEM reference numbers listed on this page. Yamaha, Mercury and Mariner are mentioned only to identify compatibility and reference numbers; this product is not manufactured by those companies.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the exact engine model, year or serial range, stroke type and carburetor configuration before ordering.\u003c\/li\u003e\n  \u003cli\u003eCompare the original parts and sealing surfaces with the replacement parts before installation.\u003c\/li\u003e\n  \u003cli\u003eFuel-system service should be performed away from flames, sparks and other ignition sources.\u003c\/li\u003e\n  \u003cli\u003eFollow the engine manufacturer's service procedures for disassembly, adjustment, leak checks and testing.\u003c\/li\u003e\n  \u003cli\u003eDo not rely on horsepower alone to confirm compatibility.\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 Replacement Parts\u003c\/strong\u003e — We provide aftermarket components for repair and maintenance of marine engines.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Product pages include available model, configuration and reference-number information to support compatibility checks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomer Support\u003c\/strong\u003e — If your model or carburetor reference is not shown, contact support with the complete engine identification and original part information before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723798221115,"sku":"19CR009","price":25.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/19CR009-1.jpg?v=1763032058"},{"product_id":"water-pump-impeller-kit-fits-yamaha-25-50-hp-replaces-6h4-44352-6h4-w0078-00","title":"Water Pump Impeller – Fits Yamaha 25–50 HP 2-Stroke Outboards","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 {\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\u003ewater pump impeller\u003c\/strong\u003e is a direct-fit replacement for selected Yamaha 25–50 HP 2-stroke outboard water pump applications. The flexible marine-grade rubber impeller is designed to restore water-pump circulation and help maintain proper engine cooling.\u003c\/p\u003e\n\u003cp\u003eThis impeller corresponds to Yamaha water pump impeller reference \u003cstrong\u003e6H4-44352-02\u003c\/strong\u003e and is associated with water pump service reference \u003cstrong\u003e6H4-W0078-00\u003c\/strong\u003e. Always compare the original impeller, keyway, engine model, year, and serial-number range before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAftermarket replacement for the water pump impeller.\u003c\/li\u003e\n  \u003cli\u003eDurable marine-grade rubber construction for regular marine service.\u003c\/li\u003e\n  \u003cli\u003eDesigned for straightforward replacement when the existing pump housing and related components are serviceable.\u003c\/li\u003e\n  \u003cli\u003eSuitable for preventative maintenance or replacement of a worn impeller.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number References\u003c\/h2\u003e\n\u003cp\u003eUse the following references to help compare the replacement with your existing part and service information.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number References\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand or Reference\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eReference Type\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6H4-44352-02\u003c\/td\u003e\n        \u003ctd\u003eWater pump impeller reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6H4-W0078-00\u003c\/td\u003e\n        \u003ctd\u003eWater pump service reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3415, 18-3434\u003c\/td\u003e\n        \u003ctd\u003eRelated catalog references; verify component scope before purchase\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGLM\u003c\/td\u003e\n        \u003ctd\u003e12276\u003c\/td\u003e\n        \u003ctd\u003eRelated aftermarket reference; verify component scope before purchase\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n\u003cp\u003eThis impeller is intended for selected Yamaha 25–50 HP 2-stroke outboards using the 6H4 impeller pattern. Model, year, shaft configuration, and serial-number conditions can affect fitment, so confirm the complete engine identification before ordering.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Yamaha Engine Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eRated Horsepower\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eImpeller Reference\u003c\/th\u003e\n        \u003cth\u003eFitment Note\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e25–50 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e6H4-44352-02\u003c\/td\u003e\n        \u003ctd\u003eSelected applications; confirm exact model, year, and serial number\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eDo not use the broad horsepower range alone as confirmation of fitment. Compare your original part and consult the applicable Yamaha parts diagram or service information for the exact engine.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eWater pump impeller\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eSelected Yamaha 25–50 HP 2-stroke outboards\u003c\/dd\u003e\n  \u003cdt\u003eConstruction\u003c\/dt\u003e\n  \u003cdd\u003eMarine-grade rubber impeller\u003c\/dd\u003e\n  \u003cdt\u003eImpeller Dimensions\u003c\/dt\u003e\n  \u003cdd\u003e51.2 mm outer diameter × 16.1 mm inner diameter × 19.05 mm height\u003c\/dd\u003e\n  \u003cdt\u003eReplacement Scope\u003c\/dt\u003e\n  \u003cdd\u003eImpeller only; not a complete water pump repair kit\u003c\/dd\u003e\n  \u003cdt\u003eProduct Status\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement, not an OEM-manufactured component\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 Water pump impeller\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e water pump housing, wear plate, gaskets, O-rings, Woodruff key, bolts, or other water pump repair-kit components unless specifically shown and stated in the order details.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery and follow the outboard manufacturer's safety procedures.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit according to the service instructions for your exact engine.\u003c\/li\u003e\n  \u003cli\u003eRemove the water pump cover or housing to access the old impeller.\u003c\/li\u003e\n  \u003cli\u003eRemove the old impeller and inspect the drive key, keyway, housing, wear plate, gaskets, and seals.\u003c\/li\u003e\n  \u003cli\u003eClean the pump area and replace any damaged or worn related components before reassembly.\u003c\/li\u003e\n  \u003cli\u003eInstall the drive key and new impeller on the driveshaft. Turn the impeller in the correct direction as the housing is installed so the vanes seat properly.\u003c\/li\u003e\n  \u003cli\u003eReinstall the housing, cover, and sealing components using the manufacturer's torque specifications.\u003c\/li\u003e\n  \u003cli\u003eReattach the lower unit and confirm that all fasteners and connections are secure.\u003c\/li\u003e\n  \u003cli\u003eRun the engine only in an appropriate water supply and verify a steady cooling-water tell-tale stream before normal operation.\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 impeller fits my Yamaha outboard?\u003c\/summary\u003e\n  \u003cp\u003eCheck the complete engine model, horsepower, stroke, year, and serial-number range against the applicable parts information. Also compare the original impeller's outside diameter, inside diameter, height, keyway, and vane configuration with the specifications shown on this page.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are common signs of a worn water pump impeller?\u003c\/summary\u003e\n  \u003cp\u003eSymptoms may include engine overheating, especially at idle or low speed, a weak or missing tell-tale stream, damaged or permanently curved vanes, or visible cracking and brittleness.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this listing include a complete water pump repair kit?\u003c\/summary\u003e\n  \u003cp\u003eNo. This listing is for one flexible rubber water pump impeller only. The housing, wear plate, gaskets, O-rings, key, bolts, and other repair components are not included.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM Yamaha part?\u003c\/summary\u003e\n  \u003cp\u003eNo. This is an aftermarket replacement manufactured to match the applicable impeller dimensions and reference application. Yamaha and other brand names and part numbers are used only to identify compatibility and reference information.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should a water pump impeller be replaced?\u003c\/summary\u003e\n  \u003cp\u003eInspect the impeller during scheduled water pump service and replace it when the vanes are cracked, brittle, worn, or permanently deformed. Service more frequently when the outboard operates in saltwater, silty water, or other abrasive conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I install the impeller without replacing the housing?\u003c\/summary\u003e\n  \u003cp\u003eYes, if the housing, wear plate, key, gaskets, and seals are within serviceable condition. Replace any component that is scored, warped, damaged, or excessively worn to avoid premature impeller failure.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eConfirm fitment using the complete engine model and serial-number information before purchase.\u003c\/li\u003e\n  \u003cli\u003eCompare the product dimensions and appearance with the original part before installation.\u003c\/li\u003e\n  \u003cli\u003eDo not operate an outboard without an adequate water supply for cooling.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when lower-unit removal or water-pump service is unfamiliar.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement and is not manufactured by Yamaha.\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 Replacement Parts\u003c\/strong\u003e — Practical aftermarket components for routine repair and maintenance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment-Focused Information\u003c\/strong\u003e — Clear reference numbers and application details to support accurate part comparison.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Competitive replacement parts selected for everyday marine service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723798253883,"sku":"23KY081","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_40_-_50_HP_6H4-44352_-_JLM_MARINE-8289023.jpg?v=1763032059"}],"url":"https:\/\/seasierra.com\/collections\/yamaha-4-stroke-outboard-engine-20-40hp-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}