{"title":"Mercury 4-Stroke 3HP Outboard Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;max-width:980px;margin:0 auto;\"\u003e\n  \u003cp\u003eThis page is tailored for Mercury 4-Stroke 3HP outboard engines. Use it to quickly find compatible parts and service guidance, including maintenance intervals, commonly replaced items, and troubleshooting tips. You can also browse the main Mercury 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 results by horsepower, year range, and part category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;padding:10px 16px;border:1px solid #1a1a1a;border-radius:6px;text-decoration:none;\"\u003eBrowse All Mercury Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"max-width:980px;margin:24px auto;\"\u003e\n  \u003ch2\u003eHow to Identify Your 3HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the nameplate\/serial plate on the transom bracket (often port\/left side) or on the swivel bracket. Record the full serial number and any suffix.\u003c\/li\u003e\n    \u003cli\u003eModel\/serial decoding: small portable Mercury 4‑strokes often include suffixes for shaft length (S = short 15\", L = long 20\") and starting\/control type. Note these when selecting props and gearcase parts.\u003c\/li\u003e\n    \u003cli\u003e4‑Stroke identifiers: look for a crankcase oil fill and dipstick on the powerhead. Unlike older 2‑strokes, these engines do not require premix fuel.\u003c\/li\u003e\n    \u003cli\u003ePlatform variations: some 3–3.5 HP 4‑stroke models use different carburetor assemblies and airbox designs across serial ranges. Always match parts by your exact serial to avoid mismatch.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"max-width:980px;margin:24px auto;\"\u003e\n  \u003ch2\u003eEngine Overview\u003c\/h2\u003e\n  \u003ch3\u003ePortable 4‑Stroke Single‑Cylinder (3–3.5 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 #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 #eee;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eWater‑cooled, single‑cylinder, carbureted 4‑stroke with TCI ignition; manual start, tiller steer; short or long shaft.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e3–3.5 HP 4‑stroke portable variants across multiple serial ranges. Examples include early and later carburetor versions found on small Mercury 4‑strokes.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eVery light and simple to service; excellent fuel economy; ideal for dinghies and small tenders.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eWear items like impellers, spark plugs, and anodes are routine service points. Match carburetor and gearcase parts to your serial range 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=\"max-width:980px;margin:24px auto;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for portable 4‑stroke outboards. Always follow the procedure and schedule in your official service manual for your exact serial range.\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 #eee;\"\u003eEngine oil (+ filter if equipped)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eFirst 20 hrs, then every 100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eUse marine 4‑stroke oil (FC‑W). Many 3–3.5 HP units have no spin‑on filter; follow your manual.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eOil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eEvery 100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect for water or metal. Replace seals if contamination is found.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\"\u003eMercury Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect 100 hrs; replace 200 hrs or as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eVerify correct heat range\/gap for your serial range.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eFuel filter \/ inline strainer\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eEvery 100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eReplace sooner if using E10 fuel or after storage.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\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:8px;border-bottom:1px solid #eee;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eEvery 2–3 seasons or 200 hrs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eReplace sooner if tell‑tale is weak or you run in sandy\/silty water.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-water-pump-repair-kits\"\u003eMercury Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eAnodes (corrosion protection)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect each season; replace at ~50% wasted\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eChoose alloy (zinc\/aluminum\/magnesium) for your water type.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003ePropeller and shear pin\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect regularly\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eCarry a spare pin for shallow or weedy areas.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eLower unit seals (if water intrusion)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eAs needed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eService when gear oil shows milkiness or leaks are present.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\"\u003eMercury Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"max-width:980px;margin:24px auto;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\"\u003eService \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-water-pump-repair-kits\"\u003eMercury Water Pump Repair Kits\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\u003eIgnition \/ Electrical: \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase \u0026amp; Seals: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\"\u003eMercury Lower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropellers \u0026amp; Shear Pins: \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\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:980px;margin:24px auto;\"\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 #eee;\"\u003eWeak tell‑tale stream or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eClear intake screen; verify pump prime; inspect impeller housing for wear.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eWater pump kit, impeller, intake screen, thermostat\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eUse fresh fuel; confirm choke\/enrichment works; clean idle jet; check plug gap.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eFuel filter, carburetor service parts, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003ePoor acceleration \/ low power\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect prop for damage or slipping shear pin; verify throttle opens fully; check fuel delivery.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003ePropeller\/shear pin, spark plugs, fuel filter\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eWon’t shift \/ prop won’t turn\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eCheck shift linkage at the gearcase; inspect shear pin; confirm correct gear oil level.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eShear pin, gear oil, lower unit seal kit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eMilky gear oil or metal on drain plug\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003ePressure\/vacuum test gearcase; inspect prop‑shaft and driveshaft seals.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eLower unit seal kit, bearings, gaskets\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eOil smoke after engine was laid on its side\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eClear excess oil from intake; install fresh plug; run gently until residue burns off.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eSpark plug, air intake components\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:980px;margin:24px auto;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable across all 3–3.5 HP 4‑stroke years?\u003c\/summary\u003e\n    \u003cp\u003eMany wear items are similar, but carburetor, intake, and some gearcase parts can change by serial range and variant. Always confirm using your exact model and serial number.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003eInspect annually and replace every 2–3 seasons (or about 200 hours). Replace sooner if the tell‑tale weakens, you overheat, or the engine operates in sandy or silty water.\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\u003eAt least every 100 hours or annually. If the oil looks milky or metallic, service seals and re‑test before returning to service.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to verify compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the brand (Mercury), model, full serial number (including suffix), shaft length (S\/L), and the country\/market of sale. Photos of the nameplate and the part to be replaced are very helpful.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"max-width:980px;margin:24px auto;\"\u003e\n  \u003cp\u003eReady to find parts for your Mercury by horsepower, year, and model? Browse the main collection and use the Filter \u0026amp; Sort controls to dial in the exact components you need.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;margin-top:8px;padding:10px 16px;border:1px solid #1a1a1a;border-radius:6px;text-decoration:none;\"\u003eShop Mercury Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px;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":"priming-pump-assembly-fits-mercury-marine-2-5-300-hp-replaces-895124","title":"Aftermarket Priming Pump Assembly for Mercury 8 and 9.9 HP 4-Stroke Outboards – OEM 895124","description":"\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis \u003cstrong\u003ePriming Pump Assembly\u003c\/strong\u003e is an aftermarket replacement component for manually priming the fuel system on selected Mercury 8 HP and 9.9 HP 4-Stroke outboard engines. The assembly is listed in Mercury parts-catalog applications under OEM part number \u003cstrong\u003e895124\u003c\/strong\u003e.\u003c\/p\u003e\n  \u003cp\u003eUse the model, stroke, and serial-number conditions below to compare your engine with the documented applications before ordering. This listing is for the priming pump assembly only.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eAftermarket replacement for Mercury OEM part number 895124.\u003c\/li\u003e\n    \u003cli\u003eUsed to manually prime the fuel system before starting the engine.\u003c\/li\u003e\n    \u003cli\u003eApplicable to selected Mercury 8 HP and 9.9 HP 4-Stroke outboards.\u003c\/li\u003e\n    \u003cli\u003eVerify the original part number, engine model, and serial number before installation.\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 compare the documented OEM reference for this replacement assembly.\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\u003eReference Type\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury Marine\u003c\/td\u003e\n          \u003ctd\u003e895124\u003c\/td\u003e\n          \u003ctd\u003eOEM reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eThe documented catalog applications below keep the engine model, horsepower, stroke, and serial-number conditions together. A general horsepower range or model-family match is not sufficient to confirm fitment.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel\u003c\/th\u003e\n          \u003cth\u003eRated HP\u003c\/th\u003e\n          \u003cth\u003eStroke\u003c\/th\u003e\n          \u003cth\u003eSerial Number\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\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e8 (4-STROKE) (209cc)\u003c\/td\u003e\n          \u003ctd\u003e8 HP\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0R042475 and up\u003c\/td\u003e\n          \u003ctd\u003e895124\u003c\/td\u003e\n          \u003ctd\u003eCatalog-listed priming pump assembly; cowling applications include handle models.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e8 (4-STROKE) (209cc)\u003c\/td\u003e\n          \u003ctd\u003e8 HP\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0P325500 and up\u003c\/td\u003e\n          \u003ctd\u003e895124\u003c\/td\u003e\n          \u003ctd\u003eCatalog-listed priming pump assembly; cowling applications include handle models.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e9.9 (4-STROKE) (209cc)\u003c\/td\u003e\n          \u003ctd\u003e9.9 HP\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0R042475 and up\u003c\/td\u003e\n          \u003ctd\u003e895124\u003c\/td\u003e\n          \u003ctd\u003eCatalog-listed priming pump assembly; cowling applications include handle models.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e9.9 (4-STROKE) (209cc)\u003c\/td\u003e\n          \u003ctd\u003e9.9 HP\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0P325500 and up\u003c\/td\u003e\n          \u003ctd\u003e895124\u003c\/td\u003e\n          \u003ctd\u003eCatalog-listed priming pump assembly; cowling applications include handle 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\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n    \u003cdd\u003ePriming pump assembly\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n    \u003cdd\u003eSelected Mercury 8 HP and 9.9 HP 4-Stroke outboards\u003c\/dd\u003e\n    \u003cdt\u003eOEM Reference\u003c\/dt\u003e\n    \u003cdd\u003eMercury Marine 895124\u003c\/dd\u003e\n    \u003cdt\u003eFuel System Function\u003c\/dt\u003e\n    \u003cdd\u003eManual fuel-system priming before engine startup\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\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Aftermarket priming pump assembly\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eFuel lines, mounting hardware, and other engine components are not included unless specifically shown or stated in the product options.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003cp\u003eAlways consult the engine’s service manual before beginning work. The following steps are a general guide and may vary by engine configuration:\u003c\/p\u003e\n  \u003col\u003e\n    \u003cli\u003eTurn the engine off, allow it to cool, and work in a well-ventilated area away from ignition sources.\u003c\/li\u003e\n    \u003cli\u003eDisconnect the battery or follow the service manual’s starting-system safety procedure, where applicable.\u003c\/li\u003e\n    \u003cli\u003eRelieve fuel-system pressure as specified by the service manual and keep suitable rags available for fuel spillage.\u003c\/li\u003e\n    \u003cli\u003eIdentify the existing priming pump assembly and note the fuel-line routing and flow direction.\u003c\/li\u003e\n    \u003cli\u003eDisconnect the fuel lines from the old assembly using appropriate tools and precautions.\u003c\/li\u003e\n    \u003cli\u003eRemove the mounting hardware, if fitted, and take out the old assembly.\u003c\/li\u003e\n    \u003cli\u003eInstall the replacement assembly in the same orientation and secure it using the original or specified hardware.\u003c\/li\u003e\n    \u003cli\u003eReconnect the fuel lines securely and confirm that their routing is not kinked or strained.\u003c\/li\u003e\n    \u003cli\u003ePrime the fuel system according to the engine service procedure.\u003c\/li\u003e\n    \u003cli\u003eInspect every connection for fuel leakage before starting or operating the engine.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if my priming pump needs replacing?\u003c\/summary\u003e\n    \u003cp\u003eCommon symptoms can include a primer bulb or pump that will not become firm, visible cracking, fuel leakage, loss of prime, or difficult starting caused by inadequate fuel delivery. Inspect the complete fuel system before replacing the assembly.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a direct fit for every Mercury outboard?\u003c\/summary\u003e\n    \u003cp\u003eNo. The documented applications are selected Mercury 8 HP and 9.9 HP 4-Stroke models with the serial-number conditions shown above. Do not use the former broad 2.5–60 HP claim as a fitment guide. Verify that your original assembly or parts catalog references OEM number 895124 and that your model and serial number match.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the function of a priming pump?\u003c\/summary\u003e\n    \u003cp\u003eA priming pump is used to move fuel through the fuel system before starting. Operating the primer helps fill the system and supply fuel to the engine when the system has lost prime or the engine has not been operated for some time.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat can cause a primer pump to fail?\u003c\/summary\u003e\n    \u003cp\u003eAge, fuel exposure, ultraviolet exposure, heat, contamination, and repeated flexing can contribute to hardening, cracking, leakage, or loss of pumping action. The fuel lines and connections should also be checked during diagnosis.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM component?\u003c\/summary\u003e\n    \u003cp\u003eNo. This listing is for an aftermarket replacement assembly that references Mercury OEM part number 895124. Mercury is a trademark of its respective owner and is used only to identify the documented application.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat should I verify before ordering?\u003c\/summary\u003e\n    \u003cp\u003eCompare the original assembly, OEM reference number, engine model, horsepower, stroke, and complete serial number with the compatibility information above. If any of these details differ, consult the engine parts catalog or a qualified marine technician before ordering.\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\u003eFuel is flammable. Work in a ventilated area away from sparks, flames, hot surfaces, and smoking materials.\u003c\/li\u003e\n    \u003cli\u003eRelieve or contain fuel safely and clean any spilled fuel before starting the engine.\u003c\/li\u003e\n    \u003cli\u003eVerify the application against the original part and complete engine serial number; do not rely on horsepower alone.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when the correct procedure or fuel-system condition is uncertain.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine replacement parts selected for practical service applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFitment-Focused Support\u003c\/strong\u003e — Product information is organized around documented model, stroke, and serial-number conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — We aim to provide dependable replacement options with clear application information.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718270783803,"sku":"JFP-3458","price":28.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/JFP-3458.png?v=1762958718"},{"product_id":"water-pump-impeller-fits-mercury-mariner-2-6-hp-outboards-replaces-47-16154-369650211","title":"Water Pump Impeller for Mercury\/Mariner 2–6 HP Outboards – Replaces Mercury 47-16154, 47-16154-3 and Sierra 18-3098","description":"\u003csection\u003e\n\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket \u003cstrong\u003ewater pump impeller\u003c\/strong\u003e is designed as a replacement for selected Mercury and Mariner small outboard engines from 2 to 6 HP. The listed applications include Mercury\/Mariner 2-stroke models from 1987–2006 and 4-stroke models from 1999–2006. Confirm the exact engine model, stroke, year and serial-number range before ordering.\u003c\/p\u003e\n\u003cp\u003eThis impeller is listed as a replacement for Mercury part numbers \u003cstrong\u003e47-16154\u003c\/strong\u003e and \u003cstrong\u003e47-16154-3\u003c\/strong\u003e, and Sierra part number \u003cstrong\u003e18-3098\u003c\/strong\u003e. These references identify replacement relationships; they do not mean the part is manufactured by Mercury or Sierra.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for direct installation on the water-pump drive shaft when the listed application and dimensions match.\u003c\/li\u003e\n  \u003cli\u003eMolded neoprene impeller material helps maintain water flow through the cooling system.\u003c\/li\u003e\n  \u003cli\u003ePackage includes one impeller and one mounting pin\/drive key.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse the following references together with your engine model and serial number to confirm compatibility.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n\u003ctable class=\"ss-table\" aria-label=\"Part Number Cross-Reference\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e47-16154-3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3098\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe application information below must be checked as a complete combination of brand, model or serial range, horsepower, stroke and year. Do not rely on horsepower alone.\u003c\/p\u003e\n\n\u003ch3\u003eMercury\/Mariner 2-Stroke Outboards\u003c\/h3\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n\u003ctable class=\"ss-table\" aria-label=\"Mercury and Mariner 2-Stroke Outboard Compatibility\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel or Serial Range\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0T884302 and up\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0G710613 and up\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1993–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0G710613–0T894438\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0T894439 and up\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0P017000–0P400999\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0P401000 and up\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0G710613–0T894438\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0T894439 and up\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0P017000–0P400999\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0P401000 and up\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMariner\u003c\/td\u003e\n\u003ctd\u003e3.3 HP with shift\u003c\/td\u003e\n\u003ctd\u003e3.3\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1993–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003eSerial 0D901217 and up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMariner\u003c\/td\u003e\n\u003ctd\u003e1-cylinder models\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003eSerial 0A809601 and up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMariner\u003c\/td\u003e\n\u003ctd\u003e1-cylinder models\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003eSerial 0A809601 and up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eMercury\/Mariner 4-Stroke Outboards\u003c\/h3\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n\u003ctable class=\"ss-table\" aria-label=\"Mercury and Mariner 4-Stroke Outboard Compatibility\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel or Serial Range\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eCarbureted, 0R131842 and up\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eCarbureted, 0R131842 and up\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eCarbureted, 0R131842 and up\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0P073456 and up\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0P073456 and up\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e0P073456 and up\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMariner\u003c\/td\u003e\n\u003ctd\u003eModel not specified\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003eSerial 0R411838 and up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMariner\u003c\/td\u003e\n\u003ctd\u003eModel not specified\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003eSerial 0R411838 and up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMariner\u003c\/td\u003e\n\u003ctd\u003eModel not specified\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003eSerial 0R411838 and up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMariner\u003c\/td\u003e\n\u003ctd\u003eModel not specified\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999–2006\u003c\/td\u003e\n\u003ctd\u003e47-161838 and up\u003c\/td\u003e\n\u003ctd\u003eSerial 0R411838 and up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMariner\u003c\/td\u003e\n\u003ctd\u003eModel not specified\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999–2006\u003c\/td\u003e\n\u003ctd\u003e47-16154\u003c\/td\u003e\n\u003ctd\u003eSerial 0R411838 and up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eWater pump impeller\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eSelected Mercury and Mariner 2–6 HP outboards\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect drive-shaft installation when application and dimensions match\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eNeoprene rubber\u003c\/dd\u003e\n  \u003cdt\u003eColor\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n  \u003cdt\u003eOverall Diameter\u003c\/dt\u003e\n\u003cdd\u003e33.8 mm (1.33 in)\u003c\/dd\u003e\n  \u003cdt\u003eInternal Shaft Diameter\u003c\/dt\u003e\n\u003cdd\u003e10.4 mm (0.41 in)\u003c\/dd\u003e\n  \u003cdt\u003eHeight\u003c\/dt\u003e\n\u003cdd\u003e14.2 mm (0.56 in)\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e7.9 g (0.28 oz)\u003c\/dd\u003e\n  \u003cdt\u003eDrive Connection\u003c\/dt\u003e\n\u003cdd\u003eShaft-mounted with included pin\/drive key\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Water pump impeller\u003c\/li\u003e\n  \u003cli\u003e1 × Mounting pin\/drive key\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the spark-plug leads and battery, where fitted, to prevent accidental starting.\u003c\/li\u003e\n  \u003cli\u003ePlace the outboard gear selector in neutral.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit or gearcase according to the engine service manual.\u003c\/li\u003e\n  \u003cli\u003eRemove the water-pump housing to access the old impeller.\u003c\/li\u003e\n  \u003cli\u003eRecord the old vane orientation and remove the impeller and drive pin\/key.\u003c\/li\u003e\n  \u003cli\u003eClean the pump housing and wear plate. Replace worn or damaged pump components before installation.\u003c\/li\u003e\n  \u003cli\u003eInstall the included drive pin\/key in the shaft groove.\u003c\/li\u003e\n  \u003cli\u003eFit the new impeller over the shaft and rotate it in the correct direction to pre-bend the vanes.\u003c\/li\u003e\n  \u003cli\u003eApply a light film of clean water or suitable marine assembly lubricant to the impeller and housing. Do not run a dry impeller.\u003c\/li\u003e\n  \u003cli\u003eReinstall the water-pump housing and tighten fasteners to the manufacturer’s specification.\u003c\/li\u003e\n  \u003cli\u003eReattach the lower unit and test the cooling-water flow in a safe water supply before normal operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I confirm whether this impeller fits my engine?\u003c\/summary\u003e\u003cp\u003eCompare the complete engine model, serial number, horsepower, stroke and year with the compatibility tables. Also compare the old impeller’s dimensions and drive-pin arrangement. If any detail differs, consult the engine service manual or a qualified marine technician before ordering.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the signs of a failing water-pump impeller?\u003c\/summary\u003e\u003cp\u003eCommon signs include overheating at idle or low speed, a weak or missing telltale stream, reduced cooling-water flow, and cracked, stiff or damaged rubber vanes when the impeller is inspected.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should the impeller be replaced?\u003c\/summary\u003e\u003cp\u003eInspect the impeller during routine service and replace it when the vanes are damaged, permanently set, cracked or hardened. Replacement intervals depend on engine use and water conditions, especially salt, sand and silt exposure.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs the included pin necessary?\u003c\/summary\u003e\u003cp\u003eYes. The pin acts as the drive key that locks the impeller to the shaft. Install the impeller with the correct pin in place and do not operate the water pump without it.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\u003cp\u003eNo. This is an aftermarket replacement impeller. Mercury, Mariner and Sierra are referenced only to identify compatible engines and replacement part numbers; this product is not manufactured or branded by those companies.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat should I do if the new impeller does not fit?\u003c\/summary\u003e\u003cp\u003eDo not force the impeller onto the shaft or into the housing. Recheck the engine serial range, original part number, shaft diameter, overall dimensions and drive-pin arrangement before installation.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the complete application and physical dimensions before purchase.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the starting system before servicing the lower unit.\u003c\/li\u003e\n  \u003cli\u003eNever operate the engine without an adequate water supply to the cooling system.\u003c\/li\u003e\n  \u003cli\u003eInspect the pump housing, wear plate, seals and related components while replacing the impeller.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when lower-unit service is unfamiliar.\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 service and repair.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Compatibility references are provided to help match the part to the correct engine.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupport for Installation\u003c\/strong\u003e — Check the engine service manual for model-specific removal, installation and torque procedures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723790455099,"sku":"AQ-BY1S-YMPM","price":17.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/AQ-BY1S-YMPM.png?v=1763031862"},{"product_id":"water-pump-impeller-fits-mercury-mariner-2-2-5-3-3-3-4-5-6-hp-replaces-47-16154-47-161543","title":"Water Pump Impeller for Mercury\/Mariner 3.3, 4, 5 and 6 HP Outboards – Replaces 47-16154 and 47-161543","description":"\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis aftermarket \u003cstrong\u003ewater pump impeller\u003c\/strong\u003e is designed for specified Mercury and Mariner outboard applications. The documented applications include 2-stroke 3.3 HP models from 1993 and newer, 2-stroke 4 and 5 HP models from 1987 and newer, and 4-stroke 4, 5 and 6 HP models from 1999 and newer.\u003c\/p\u003e\n  \u003cp\u003eUse the engine model, horsepower, stroke type and year together when confirming fitment. The impeller replaces Mercury Marine references \u003cstrong\u003e47-16154\u003c\/strong\u003e and \u003cstrong\u003e47-161543\u003c\/strong\u003e. Sierra reference \u003cstrong\u003e18-3098\u003c\/strong\u003e is also listed as an aftermarket cross-reference.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Water pump impeller\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Selected Mercury and Mariner outboards\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Direct replacement when the application and dimensions match\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eImportant:\u003c\/strong\u003e Confirm the complete engine model and year before ordering\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eThe following references are provided for identification and cross-reference purposes. They should be checked against the original impeller and the complete engine application.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury Marine\u003c\/td\u003e\n          \u003ctd\u003e47-16154 \/ 47-161543\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eSierra\u003c\/td\u003e\n          \u003ctd\u003e18-3098\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMallory\u003c\/td\u003e\n          \u003ctd\u003e9-45302 \/ 9-45302-10\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eQuickMarine\u003c\/td\u003e\n          \u003ctd\u003e161543\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eThe table below summarizes the listed Mercury and Mariner application ranges. Exact model designation, production year, serial range and stroke type must be verified before installation.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel Description\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\u003eMercury\/Mariner\u003c\/td\u003e\n          \u003ctd\u003eShiftable\u003c\/td\u003e\n          \u003ctd\u003e3.3\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1993 and newer\u003c\/td\u003e\n          \u003ctd\u003e47-16154 \/ 47-161543\u003c\/td\u003e\n          \u003ctd\u003eVerify the exact model and serial range.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n          \u003ctd\u003eStandard\u003c\/td\u003e\n          \u003ctd\u003e4 \/ 5\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1987 and newer\u003c\/td\u003e\n          \u003ctd\u003e47-16154 \/ 47-161543\u003c\/td\u003e\n          \u003ctd\u003eVerify the exact model and serial range.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n          \u003ctd\u003eSmall outboard applications\u003c\/td\u003e\n          \u003ctd\u003e4 \/ 5 \/ 6\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1999 and newer\u003c\/td\u003e\n          \u003ctd\u003e47-16154 \/ 47-161543\u003c\/td\u003e\n          \u003ctd\u003eVerify the exact model and serial range.\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n    \u003cdd\u003eWater pump impeller\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n    \u003cdd\u003eSelected Mercury and Mariner outboards\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eDirect replacement when fitment is confirmed\u003c\/dd\u003e\n    \u003cdt\u003eColor\u003c\/dt\u003e\n    \u003cdd\u003eBlack\u003c\/dd\u003e\n    \u003cdt\u003eWeight\u003c\/dt\u003e\n    \u003cdd\u003e0.04 kg (0.09 lb)\u003c\/dd\u003e\n    \u003cdt\u003eOEM References\u003c\/dt\u003e\n    \u003cdd\u003eMercury Marine 47-16154 and 47-161543\u003c\/dd\u003e\n    \u003cdt\u003eAftermarket Cross-Reference\u003c\/dt\u003e\n    \u003cdd\u003eSierra 18-3098\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Water pump impeller\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eGaskets, drive keys and other water-pump service parts are not confirmed as included with this impeller listing. Reuse only serviceable components or purchase replacement components separately when required by the engine manufacturer’s service procedure.\u003c\/p\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eSwitch off the engine, disconnect the battery where applicable, and secure the outboard in accordance with the manufacturer’s service instructions.\u003c\/li\u003e\n    \u003cli\u003eRemove the lower unit as specified in the service manual for your exact engine.\u003c\/li\u003e\n    \u003cli\u003eRemove the water-pump housing and retain the fasteners and components in their original positions.\u003c\/li\u003e\n    \u003cli\u003eRemove the old impeller and inspect the drive key, wear plate, cup, housing and seals for damage or excessive wear.\u003c\/li\u003e\n    \u003cli\u003eClean the water-pump components and confirm that the replacement impeller matches the original part in size, vane configuration and keyway arrangement.\u003c\/li\u003e\n    \u003cli\u003eInstall the drive key and new impeller according to the engine manufacturer’s instructions. Use a suitable lubricant or installation aid only if specified by that procedure.\u003c\/li\u003e\n    \u003cli\u003eReinstall the water-pump housing, plate, gasket and related components in the correct order, replacing damaged or worn service parts.\u003c\/li\u003e\n    \u003cli\u003eReattach the lower unit and tighten all fasteners to the manufacturer’s specified torque.\u003c\/li\u003e\n    \u003cli\u003eRun the engine using the manufacturer-approved water supply method and confirm a steady tell-tale stream before normal operation.\u003c\/li\u003e\n    \u003cli\u003eStop the engine immediately if the tell-tale stream is weak or absent, or if an overheating warning occurs.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\u003csummary\u003eHow do I know if this impeller fits my outboard?\u003c\/summary\u003e\u003cp\u003eCheck the complete engine model, horsepower, year, stroke type and serial range against the application information. Also compare the original impeller and drive-key arrangement with the replacement. A horsepower match alone does not confirm fitment.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat are the signs of a failing water pump impeller?\u003c\/summary\u003e\u003cp\u003eCommon symptoms include a weak or absent water stream from the tell-tale outlet, an overheating warning, rising engine temperature and, in severe cases, steam or overheating damage. Stop operating the engine if cooling flow is inadequate.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eHow often should I replace my impeller?\u003c\/summary\u003e\u003cp\u003eReplacement intervals depend on the engine manufacturer’s service schedule and operating conditions. Inspect the impeller regularly and replace it when it is cracked, hardened, damaged, deformed or worn. More frequent service may be needed in saltwater or sandy and silty conditions.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eIs this part difficult to install?\u003c\/summary\u003e\u003cp\u003eInstallation requires access to the water pump and usually removal of the lower unit. A mechanically experienced owner may be able to perform the work with the correct tools and service information. Professional installation is recommended if you are not familiar with outboard lower-unit service.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eAre a gasket and drive key included?\u003c\/summary\u003e\u003cp\u003eThis listing is for one water pump impeller. A gasket, drive key and other service parts are not confirmed as included. Check the package contents and your engine service procedure before beginning installation.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\u003cp\u003eThis is an aftermarket replacement impeller, not a Mercury Marine OEM component. Mercury Marine part numbers are shown only as application and cross-reference information.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eCan I use the part number alone to confirm fitment?\u003c\/summary\u003e\u003cp\u003ePart-number cross-references are useful for identification, but the engine model, year, horsepower, stroke type and serial range should also be confirmed. If the original impeller differs in dimensions or drive-key arrangement, do not install the replacement without further verification.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat if the engine still overheats after installation?\u003c\/summary\u003e\u003cp\u003eStop the engine and inspect the impeller installation, drive key, housing, wear plate, water passages, seals and intake screens. Confirm that the pump is receiving an adequate water supply and consult the engine service manual or a qualified technician.\u003c\/p\u003e\u003c\/details\u003e\n\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the engine model, year, horsepower, stroke type and serial range before ordering.\u003c\/li\u003e\n    \u003cli\u003eCompare the replacement impeller with the original part before installation.\u003c\/li\u003e\n    \u003cli\u003eDo not operate the engine without an adequate cooling-water supply.\u003c\/li\u003e\n    \u003cli\u003eIf the tell-tale stream is weak or absent, stop the engine and investigate before continued use.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when lower-unit service is unfamiliar.\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 replacement components for common marine service applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Product references and fitment information are provided to help identify the correct replacement.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eService-Ready Information\u003c\/strong\u003e — Confirm the complete engine application and manufacturer service procedure before installation.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723790487867,"sku":"24KM100-QM","price":18.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/24KM100-QM.png?v=1763031863"},{"product_id":"water-pump-impeller-repair-kit-fits-mercury-tohatsu-2-3-5-hp-replaces-16159a2-8m0080264-3ab-87322-0","title":"Water Pump Repair Kit for Mercury 3.3 HP 2-Stroke and Tohatsu MFS2–MFS3.5 4-Stroke Outboards – Replaces 16159A2, 8M0080264 and 3AB-87322-0","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 { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis \u003cstrong\u003eWater Pump Repair Kit\u003c\/strong\u003e is an aftermarket replacement for selected small Mercury and Tohatsu outboard water-pump assemblies. Catalog references identify the Mercury application around 3.3 HP 2-stroke outboards, including shiftable engines, and the Tohatsu application for MFS2, MFS2.5 and MFS3.5B\/C 4-stroke models. Always match the complete OEM part number and engine serial or model information before ordering.\u003c\/p\u003e\n  \u003cp\u003eThe kit is intended to replace water-pump service components associated with Mercury references \u003cstrong\u003e16159A2\u003c\/strong\u003e, \u003cstrong\u003e8M0080264\u003c\/strong\u003e and \u003cstrong\u003e889246A16\u003c\/strong\u003e, together with Tohatsu reference \u003cstrong\u003e3AB-87322-0\u003c\/strong\u003e. The listed numbers are manufacturer or OEM reference numbers only; this product is not an OEM-branded part.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eReplacement water-pump service kit for selected small outboards.\u003c\/li\u003e\n    \u003cli\u003eDesigned for servicing the impeller, wear surfaces and associated gaskets in the applicable pump assembly.\u003c\/li\u003e\n    \u003cli\u003eIncludes a six-blade impeller with a nylon hub.\u003c\/li\u003e\n    \u003cli\u003eConfirm the reference number, engine model, stroke, year and serial range before installation.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse the following references to compare the required water-pump repair kit with your original part or service-manual listing.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eManufacturer or OEM Reference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury \/ Mercury Mariner\u003c\/td\u003e\n\u003ctd\u003e16159A2\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury \/ Mercury Mariner\u003c\/td\u003e\n\u003ctd\u003e47-16159A2\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury \/ Mercury Mariner\u003c\/td\u003e\n\u003ctd\u003e8M0080264\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury \/ Mercury Mariner\u003c\/td\u003e\n\u003ctd\u003e47-8M0080264\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury \/ Mercury Mariner\u003c\/td\u003e\n\u003ctd\u003e889246A16\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury \/ Mercury Mariner\u003c\/td\u003e\n\u003ctd\u003e47-889246A16\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e3AB-87322-0\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e3AB873220M\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e3F0-87322-1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e3F0873221M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eEngine and Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eFitment depends on the complete engine configuration. Model, horsepower, stroke and serial conditions must be checked together; a matching horsepower alone does not confirm compatibility.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel or Application\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYear or Serial Condition\u003c\/th\u003e\n\u003cth\u003eReference\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\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e3.3 HP outboard\u003c\/td\u003e\n          \u003ctd\u003e3.3 HP\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0D901217 through 0G710612\u003c\/td\u003e\n          \u003ctd\u003e8M0080264\u003c\/td\u003e\n          \u003ctd\u003eCatalog occurrence identifies shiftable engines.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e3.3 HP outboard\u003c\/td\u003e\n          \u003ctd\u003e3.3 HP\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0G710613 through 0T894576\u003c\/td\u003e\n          \u003ctd\u003e8M0080264\u003c\/td\u003e\n          \u003ctd\u003eVerify the exact serial number and pump configuration.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e3.3 HP outboard\u003c\/td\u003e\n          \u003ctd\u003e3.3 HP\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0T894577 and up\u003c\/td\u003e\n          \u003ctd\u003e8M0080264\u003c\/td\u003e\n          \u003ctd\u003eVerify the exact serial number and pump configuration.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eTohatsu\u003c\/td\u003e\n          \u003ctd\u003eMFS2 \/ MFS2.5 \/ MFS3.5B\u003c\/td\u003e\n          \u003ctd\u003e2–3.5 HP\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2016–2019 catalog applications\u003c\/td\u003e\n          \u003ctd\u003e3AB-87322-0\u003c\/td\u003e\n          \u003ctd\u003eCheck the model suffix and service-manual listing.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eTohatsu\u003c\/td\u003e\n          \u003ctd\u003eMFS2 \/ MFS2.5 \/ MFS3.5C\u003c\/td\u003e\n          \u003ctd\u003e2–3.5 HP\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2019–2026 catalog applications\u003c\/td\u003e\n          \u003ctd\u003e3AB-87322-0\u003c\/td\u003e\n          \u003ctd\u003eCheck the model suffix and service-manual listing.\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The catalog references above are application leads, not a substitute for checking the original part. Mercury and Tohatsu\/Nissan model naming, serial breaks and pump designs can vary by production year and market.\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 repair kit\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n    \u003cdd\u003eSelected Mercury and Tohatsu small outboard water-pump assemblies\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eDirect replacement service components; professional installation is recommended\u003c\/dd\u003e\n    \u003cdt\u003eImpeller Material\u003c\/dt\u003e\n    \u003cdd\u003eMarine-grade CR neoprene\u003c\/dd\u003e\n    \u003cdt\u003eWear Plate and Liner Material\u003c\/dt\u003e\n    \u003cdd\u003eSS316 stainless steel\u003c\/dd\u003e\n    \u003cdt\u003eImpeller Dimensions\u003c\/dt\u003e\n    \u003cdd\u003eHeight: 14.35 mm (0.56 in); overall diameter: 33.6 mm (1.32 in); hub shaft diameter: 10.4 mm (0.41 in)\u003c\/dd\u003e\n    \u003cdt\u003eWeight\u003c\/dt\u003e\n    \u003cdd\u003e57 g (2.01 oz)\u003c\/dd\u003e\n    \u003cdt\u003eImpeller Design\u003c\/dt\u003e\n    \u003cdd\u003eSix-blade impeller with nylon hub\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Water pump impeller (47-161543)\u003c\/li\u003e\n    \u003cli\u003e1 x Impeller pin (28-16155)\u003c\/li\u003e\n    \u003cli\u003e1 x Housing gasket (27-898101331)\u003c\/li\u003e\n    \u003cli\u003e1 x Wear plate gasket (27-898101332)\u003c\/li\u003e\n    \u003cli\u003e1 x Wear plate (898101371)\u003c\/li\u003e\n    \u003cli\u003e1 x Insert cup (161571)\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003ePart numbers in the package list are component or reference numbers and may differ from the package's primary application number. Compare the components with the parts removed from your engine before installation.\u003c\/p\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eMake sure the engine is stopped, cool and secured. Disconnect the battery where applicable and follow the engine manufacturer's safety instructions.\u003c\/li\u003e\n    \u003cli\u003eRemove the gearcase or lower unit according to the applicable service manual.\u003c\/li\u003e\n    \u003cli\u003eRemove the water-pump housing and note the original impeller-vane direction and component order.\u003c\/li\u003e\n    \u003cli\u003eRemove the old impeller, pin or key, wear plate and gaskets. Clean the mating surfaces without damaging the housing or driveshaft.\u003c\/li\u003e\n    \u003cli\u003eInstall the replacement wear plate and gaskets in the same orientation as the original components.\u003c\/li\u003e\n    \u003cli\u003eFit the new impeller onto the driveshaft, align the key or pin, and rotate the driveshaft in its normal operating direction while lowering the housing so the vanes seat correctly.\u003c\/li\u003e\n    \u003cli\u003eFasten the pump housing using the manufacturer's specified hardware and torque procedure.\u003c\/li\u003e\n    \u003cli\u003eReinstall the lower unit, ensuring correct alignment of the driveshaft, shift shaft and water tube where applicable.\u003c\/li\u003e\n    \u003cli\u003eRun the engine only in water or with an appropriate flushing attachment. Confirm cooling-water flow and check for leaks before normal operation.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch2\u003eTroubleshooting and FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow can I confirm that this kit fits my outboard?\u003c\/summary\u003e\n    \u003cp\u003eCompare the complete OEM reference, engine brand, model, horsepower, stroke and serial or year condition. For Mercury applications, the catalog references center on selected 3.3 HP 2-stroke engines. For Tohatsu applications, reference 3AB-87322-0 is associated with selected MFS2, MFS2.5 and MFS3.5B\/C 4-stroke models. If any detail differs, confirm the required kit with the engine service manual or a qualified marine dealer.\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\u003ePossible signs include weak or intermittent tell-tale flow, overheating at idle or low speed, reduced cooling-water output, or an impeller that is cracked, brittle, deformed or missing vane material during inspection.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should the impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eInspect the water-pump impeller according to the engine manufacturer's maintenance schedule. Service intervals depend on operating hours, storage conditions and whether the engine is used in saltwater, sand or silty water. Replace it sooner if damage or overheating symptoms are present.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use this kit if my serial number is outside the listed range?\u003c\/summary\u003e\n    \u003cp\u003eDo not assume fitment from horsepower alone. Serial-number changes can correspond to different gearcase or water-pump components. Check the complete original part number and the applicable service-manual diagram before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is an aftermarket replacement kit intended to interchange with the manufacturer references listed on this page. Mercury, Mariner and Tohatsu reference numbers are used only for identification and compatibility comparison.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the shipping options?\u003c\/summary\u003e\n    \u003cp\u003eAvailable shipping methods and delivery estimates are shown at checkout and may vary by destination, carrier and inventory location.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the warranty and return policy?\u003c\/summary\u003e\n    \u003cp\u003eWarranty coverage and returns are governed by the seller's current policy. Contact customer support before returning a product and keep the order information and original packaging available.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003ch2\u003eSafety and Important Information\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the original part, engine model, stroke, year and serial range before purchase.\u003c\/li\u003e\n    \u003cli\u003eDo not operate an outboard without an adequate cooling-water supply.\u003c\/li\u003e\n    \u003cli\u003eStop operation immediately if the engine overheats or cooling-water flow is weak or absent.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended if you are not familiar with lower-unit or water-pump service.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — Practical replacement components for selected outboard service applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFitment-Focused Information\u003c\/strong\u003e — Reference numbers and application details are provided to support careful part comparison.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGlobal Fulfillment\u003c\/strong\u003e — Shipping availability and delivery estimates are presented at checkout for the destination entered.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723791831355,"sku":"24KM315-QM","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/24KM315-QM.png?v=1763031895"}],"url":"https:\/\/seasierra.com\/collections\/mercury-4-stroke-3hp-outboard-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}