{"title":"Tohatsu 2.5-6HP 2-Stroke Outboard Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page is dedicated to Tohatsu 2-Stroke 2.5–6HP outboard engines. Use it to find compatible parts and service guidance, including maintenance tips, common replacement items, and troubleshooting help. You can also browse the main Tohatsu collection. Scroll to the bottom of the page to start browsing parts for this engine, and remember that on the collection page you can use the Filter \u0026amp; Sort controls to narrow by horsepower, year range, and part category.\u003c\/p\u003e\n  \u003cp\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#0ea5e9; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Tohatsu Parts\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 2.5–6HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the serial\/model plate on the transom clamp bracket or the swivel bracket. Record the full model code and serial number.\u003c\/li\u003e\n    \u003cli\u003eReading the code: examples like “M3.5B2S” indicate model family and shaft length (S = short, L = long, UL = ultra-long). Suffixes may also denote minor revisions\/generations.\u003c\/li\u003e\n    \u003cli\u003ePlatform clues (2‑Stroke): small HP models commonly use carburetion and manual start. Visual cues such as an integral top-mounted fuel tank and choke lever help confirm this family.\u003c\/li\u003e\n    \u003cli\u003eConfirm spark plug type and fuel mix ratio from your owner’s manual or engine label before ordering tune-up parts.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eEngine Platform Overview\u003c\/h2\u003e\n  \u003ch3\u003e2.5–3.5HP Small 2‑Stroke Platform\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\u003eCarbureted 2‑stroke, single-cylinder; manual start; integral fuel tank on many versions; tiller steer.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eExamples include M2.5A2 and M3.5A2\/M3.5B2 families.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eVery light and simple; easy to service; excellent portability.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eTypical fuel\/oil mix 50:1 with TC‑W3 two‑stroke oil after break‑in (often 25:1 during break‑in). Verify spark plugs such as NGK BP6HS‑10 or BPR6HS‑10 against your specific model.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003e5–6HP Small 2‑Stroke Platform\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\u003eCarbureted small‑displacement 2‑stroke; manual start; tiller steer; remote or integral fuel options depending on year\/region.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eModel codes vary by generation and market. Use the serial\/model plate to confirm exact specifications.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eCompact with good low‑to‑midrange thrust for dinghies and small skiffs; simple maintenance.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eParts can differ by shaft length and minor change codes. Match propeller, water pump kit, and seal kits to the exact model and serial.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for small 2‑stroke Tohatsu outboards. Always follow the procedures and schedules in your official owner’s\/service manual.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #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\u003eFuel\/Oil Mix (2‑Stroke)\u003c\/td\u003e\n        \u003ctd\u003eEach fill‑up\u003c\/td\u003e\n        \u003ctd\u003eTypically 50:1 with TC‑W3 after break‑in; many specify 25:1 during break‑in. Confirm your manual.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-outboard-parts\"\u003eTohatsu Collection\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSpark Plugs\u003c\/td\u003e\n        \u003ctd\u003eInspect 50 hrs \/ Replace annually\u003c\/td\u003e\n        \u003ctd\u003eCheck gap and heat range for your model; replace if fouled or worn.\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 \/ Inline Filter\u003c\/td\u003e\n        \u003ctd\u003eInspect 50 hrs \/ Replace as needed\u003c\/td\u003e\n        \u003ctd\u003eKeep debris and water out of carburetor; replace if contaminated.\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 2–3 seasons (sooner in silt\/sand)\u003c\/td\u003e\n        \u003ctd\u003eKey for cooling and tell‑tale flow; replace more frequently in harsh conditions.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-water-pump-repair-kits\"\u003eTohatsu Water Pump Repair 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\u003e100 hrs or annually\u003c\/td\u003e\n        \u003ctd\u003eCheck for water intrusion (milky oil); reseal if leaks are found.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-outboard-parts\"\u003eTohatsu Collection\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAnodes\u003c\/td\u003e\n        \u003ctd\u003eInspect 50 hrs \/ Replace when 30–50% consumed\u003c\/td\u003e\n        \u003ctd\u003eDo not paint anodes; ensure clean contact with metal.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePropeller \u0026amp; Shear Pin\u003c\/td\u003e\n        \u003ctd\u003eInspect 50 hrs or after impact\u003c\/td\u003e\n        \u003ctd\u003eReplace bent\/damaged blades; carry spare shear and split pins.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eLower Unit Seal Kit\u003c\/td\u003e\n        \u003ctd\u003eAs needed (if leak detected)\u003c\/td\u003e\n        \u003ctd\u003eUse when water intrusion or oil leakage is found.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-lower-unit-seal-kits\"\u003eTohatsu Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp style=\"font-size:12px; color:#6b7280;\"\u003e*Intervals may vary by model year and use. Always confirm with your manual.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \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\/tohatsu-water-pump-repair-kits\"\u003eTohatsu 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\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase \u0026amp; Seals: \u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-lower-unit-seal-kits\"\u003eTohatsu Lower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion: \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e \u0026amp; \u003ca href=\"https:\/\/seasierra.com\/collections\/propeller-guards\"\u003ePropeller Guards\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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\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\u003c\/td\u003e\n        \u003ctd\u003eInspect water inlet screens for blockage; verify impeller age; ensure thermostat and passages are clear.\u003c\/td\u003e\n        \u003ctd\u003eWater pump kit, intake screens, thermostat\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePoor acceleration \/ loss of power\u003c\/td\u003e\n        \u003ctd\u003eCheck prop for damage and correct pitch; confirm fresh fuel and correct 2‑stroke mix; inspect spark plug condition.\u003c\/td\u003e\n        \u003ctd\u003ePropeller, spark plugs, fuel filter\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd\u003eVerify choke operation; check for stale fuel; inspect plug gap and fuel filter; confirm no air leaks in fuel line.\u003c\/td\u003e\n        \u003ctd\u003eSpark plugs, fuel filter, fuel line\/connector\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eExcessive smoke (2‑Stroke)\u003c\/td\u003e\n        \u003ctd\u003eConfirm mix ratio (not too rich); ensure choke is opening after start; check for flooded carburetor.\u003c\/td\u003e\n        \u003ctd\u003eTune‑up parts, carb components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase noise or milky gear oil\u003c\/td\u003e\n        \u003ctd\u003eDrain and inspect oil for water; check prop shaft seal after line\/rope strike; look for damaged seals.\u003c\/td\u003e\n        \u003ctd\u003eLower unit seal kit, gear oil, prop shaft hardware\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between different years or minor-change codes?\u003c\/summary\u003e\n    \u003cp\u003eSome components carry over, but many items—especially water pump kits, propellers, and seal kits—depend on the exact model code, shaft length, and generation. Always match parts to the model and serial on your nameplate.\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, every 2–3 seasons, or sooner if you operate in sandy, silty, or weedy water, if the tell‑tale weakens, or after any overheat event.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change the gear oil?\u003c\/summary\u003e\n    \u003cp\u003eInspect at least annually or every 100 hours. Change immediately if you see water intrusion (milky oil) or after a propeller-line strike that may damage seals.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the full model code, serial number, shaft length (S\/L\/UL), control type (tiller\/remote), and photos of the nameplate and the part you’re replacing.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"margin-top:24px; padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eReady to find parts for your Tohatsu 2‑Stroke 2.5–6HP outboard? Browse the main Tohatsu collection and refine by horsepower, year, and model.\u003c\/p\u003e\n  \u003cp\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#10b981; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Tohatsu Outboard Parts\u003c\/a\u003e\u003c\/p\u003e\n  \u003cp style=\"font-size:12px; color:#6b7280;\"\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":"water-pump-impeller-fits-tohatsu-nissan-2-5-6-hp-replaces-369-65021-1-47-16154-3","title":"Water Pump Impeller with Key – Fits Tohatsu\/Nissan 2–5 HP 2-Stroke, MFS4–6 HP 4-Stroke and Mercury\/Mariner 2–3.5 HP 4-Stroke","description":"\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis aftermarket \u003cstrong\u003ewater pump impeller with drive key\u003c\/strong\u003e is designed to help maintain proper cooling-water circulation in compatible small outboard engines. It is listed for selected Nissan and Tohatsu 2-stroke models from 2 to 5 HP, Tohatsu MFS4–6 HP 4-stroke models, and selected Mercury\/Mariner 2–3.5 HP carbureted 4-stroke models.\u003c\/p\u003e\n  \u003cp\u003eThe impeller is supplied with the key required for installation. Confirm your exact engine model, stroke, and existing impeller dimensions before ordering.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eSix-blade water pump impeller with included drive key.\u003c\/li\u003e\n    \u003cli\u003eDirect replacement design for compatible water pump assemblies.\u003c\/li\u003e\n    \u003cli\u003eApproximate dimensions: 10.25 mm inside diameter, 33.6 mm outside diameter, and 14.2 mm width.\u003c\/li\u003e\n    \u003cli\u003eFor cooling-system service on compatible small outboard engines.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse these manufacturer and aftermarket reference numbers to help identify the correct replacement. Numbers are provided for identification and compatibility checking.\u003c\/p\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:400px; }\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  \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 or Source\u003c\/th\u003e\n\u003cth\u003eReference Number\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e369-65021-1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu catalog reference\u003c\/td\u003e\n\u003ctd\u003e369650211M\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\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        \u003ctr\u003e\n\u003ctd\u003eMallory\u003c\/td\u003e\n\u003ctd\u003e9-45302\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCEF\u003c\/td\u003e\n\u003ctd\u003e500377\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eThe applications below reflect the available product fitment records. Model, stroke, and horsepower conditions must be considered together. Do not rely on horsepower alone to confirm fitment.\u003c\/p\u003e\n  \u003ch3\u003eTohatsu and Nissan 2-Stroke Applications\u003c\/h3\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Tohatsu and Nissan 2-Stroke Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel or Description\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\/Nissan\u003c\/td\u003e\n\u003ctd\u003e2 HP models\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e369-65021-1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\/Nissan\u003c\/td\u003e\n\u003ctd\u003e2.5 HP models\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e369-65021-1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\/Nissan\u003c\/td\u003e\n\u003ctd\u003eM2.5A, M3.5A, M3.5B and related 2.5–3.5 HP models\u003c\/td\u003e\n\u003ctd\u003e2.5–3.5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e369-65021-1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\/Nissan\u003c\/td\u003e\n\u003ctd\u003e3.5 HP models\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e369-65021-1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\/Nissan\u003c\/td\u003e\n\u003ctd\u003e4–5 HP models\u003c\/td\u003e\n\u003ctd\u003e4–5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e369-65021-1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003e3.5B \/ NS5B\u003c\/td\u003e\n\u003ctd\u003e3.5–5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e369-65021-1\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003ch3\u003eTohatsu 4-Stroke Applications\u003c\/h3\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Tohatsu 4-Stroke 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\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS4\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e369-65021-1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS5\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e369-65021-1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS6\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e369-65021-1\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003ch3\u003eMercury\/Mariner 4-Stroke Applications\u003c\/h3\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Mercury Mariner 4-Stroke Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel or Description\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eCondition\u003c\/th\u003e\n\u003cth\u003eReference\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\u003e2 HP\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eCarbureted models\u003c\/td\u003e\n\u003ctd\u003e47-16154-3\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e2.5 HP\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eCarbureted models\u003c\/td\u003e\n\u003ctd\u003e47-16154-3\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e3.5 HP\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eCarbureted models\u003c\/td\u003e\n\u003ctd\u003e47-16154-3\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp\u003e\u003cstrong\u003eFitment note:\u003c\/strong\u003e The compatibility records do not establish universal fitment across every engine in the same horsepower range. Check the full model designation and compare the original impeller dimensions before installation.\u003c\/p\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\u003eWater pump impeller with drive key\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n    \u003cdd\u003eCooling-system replacement for compatible small outboard engines\u003c\/dd\u003e\n    \u003cdt\u003eNumber of Blades\u003c\/dt\u003e\n    \u003cdd\u003e6\u003c\/dd\u003e\n    \u003cdt\u003eInside Diameter\u003c\/dt\u003e\n    \u003cdd\u003e10.25 mm\u003c\/dd\u003e\n    \u003cdt\u003eOutside Diameter\u003c\/dt\u003e\n    \u003cdd\u003e33.6 mm\u003c\/dd\u003e\n    \u003cdt\u003eWidth\u003c\/dt\u003e\n    \u003cdd\u003e14.2 mm\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eDirect replacement in a matching water pump assembly\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 Six-blade water pump impeller\u003c\/li\u003e\n    \u003cli\u003e1 x Drive key\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the battery and remove the spark plug wire or wires before servicing the outboard.\u003c\/li\u003e\n    \u003cli\u003ePlace the engine in neutral and remove the fasteners securing the lower unit or gearcase.\u003c\/li\u003e\n    \u003cli\u003eSeparate the lower unit carefully, paying attention to the shift shaft and driveshaft alignment.\u003c\/li\u003e\n    \u003cli\u003eRemove the water pump housing cover and take out the old impeller and drive key.\u003c\/li\u003e\n    \u003cli\u003eClean debris from the housing and inspect the housing, wear plate, seals, and keyway for damage or excessive wear.\u003c\/li\u003e\n    \u003cli\u003eInstall the supplied key and impeller in the correct orientation. Use a suitable water-pump lubricant during assembly and rotate the driveshaft in the normal direction of operation as the impeller enters the housing.\u003c\/li\u003e\n    \u003cli\u003eReinstall the housing and any removed gaskets or seals according to the engine manufacturer's service procedure.\u003c\/li\u003e\n    \u003cli\u003eReassemble the lower unit and test the cooling-water flow using an appropriate water supply before returning the engine to service.\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 impeller is failing?\u003c\/summary\u003e\n    \u003cp\u003eCommon warning signs include weak or missing water flow from the tell-tale outlet, overheating, an overheat alarm, or visible cracks, deformation, or missing blades during inspection.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this product include the drive key?\u003c\/summary\u003e\n    \u003cp\u003eYes. This listing is for a water pump impeller supplied with a drive key. Confirm that the keyway and impeller dimensions match your original components before installation.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill this fit any 2–6 HP outboard?\u003c\/summary\u003e\n    \u003cp\u003eNo. Horsepower by itself does not confirm fitment. This product is listed for the specific Tohatsu, Nissan, and Mercury\/Mariner model groups shown above. Check the exact model, stroke type, and dimensions before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the difference between this impeller and the OEM version?\u003c\/summary\u003e\n    \u003cp\u003eThis is an aftermarket replacement impeller, not an original manufacturer-supplied component. It is intended for applications using the listed reference numbers and matching dimensions.\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 as part of regular maintenance and replace it when the blades show wear, cracking, distortion, or damage. Follow the service interval recommended for your specific engine and operating conditions.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the exact engine model, stroke type, reference number, and dimensions before purchase.\u003c\/li\u003e\n    \u003cli\u003eAll brand names and reference numbers are used only to identify compatible applications; this product is aftermarket and is not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eDo not operate an outboard with inadequate cooling-water flow. Stop the engine immediately if overheating or a loss of tell-tale flow occurs.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when you are not familiar with lower-unit or water-pump service.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cp\u003eSea Sierra supplies aftermarket marine replacement parts for maintenance and repair applications. Product compatibility should always be confirmed against the engine's exact model information and the original part before installation.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723807887675,"sku":"17IT001-K","price":16.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_for_Tohatsu_Nissan_25-6_HP_18-3098_-_JLM_MARINE-8288311.jpg?v=1763032297"}],"url":"https:\/\/seasierra.com\/collections\/tohatsu-2-5-6hp-2-stroke-outboard-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}