{"title":"Mercury 4-Stroke 25-30HP Outboard Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eThis page is dedicated to Mercury 4‑Stroke 25–30HP outboard engines. Use it to find compatible parts and service information, including maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Mercury collection. Scroll to the bottom of this page to begin browsing parts for this engine, and remember that on the collection page you can use the “Filter \u0026amp; Sort” controls to narrow results by horsepower, year range, and part category\/section.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;padding:10px 14px;border:1px solid #222;border-radius:4px;text-decoration:none;\"\u003eBrowse All Mercury Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:18px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your 25–30HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the serial\/nameplate on the transom clamp bracket (usually starboard side). Record the full serial number including any letter prefix.\u003c\/li\u003e\n    \u003cli\u003eModel\/serial prefixes (e.g., 0G\/0T\/0P series) can indicate late‑1990s through mid‑2000s production; parts often change at serial breaks, so verify before ordering.\u003c\/li\u003e\n    \u003cli\u003eRead any suffix codes for shaft length (S\/L\/XL), control type (tiller vs. remote), electric start, and power trim—these options affect certain rigging and electrical parts.\u003c\/li\u003e\n    \u003cli\u003eThese 4‑Stroke 25\/30HP units are typically carbureted and share many components; jetting and some linkage items may differ between 25HP and 30HP calibrations.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:18px 0;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n  \u003ch3\u003eCarbureted 4‑Stroke 25\/30HP (approx. late 1990s–mid‑2000s)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;max-width:920px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eSOHC 4‑stroke, carbureted small‑displacement outboard; commonly shares a gear ratio around 2.41:1. Depending on year\/serial, layout may vary, but general service parts are similar.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eMercury 25 FourStroke and 30 FourStroke, tiller or remote control, manual or electric start, with\/without power trim.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eQuiet operation, good fuel economy, broad parts availability, and shared components between 25HP and 30HP variants.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eSome parts change across serial number ranges; confirm by serial. Routine items like impellers, anodes, and gearcase seals are high‑value maintenance targets.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"padding:18px 0;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for 4‑stroke outboards. Always follow the procedures and schedules in your official Mercury service manual.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;max-width:920px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eEngine oil \u0026amp; filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eUse NMMA FC‑W or OEM‑spec 4‑stroke marine oil; replace filter each oil change.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eShop Oil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eAnnually or every 100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eInspect for water intrusion\/metal; reseal if contamination is found.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\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      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eCheck gap, replace if fouled or worn for easier starts and smooth idle.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\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:6px 4px;\"\u003eFuel filter \/ water‑separating filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eReplace more often with ethanol fuel or dirty tanks; keep spare on board.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eWater pump impeller\/kit\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eEvery 2–3 seasons (sooner if weak tell‑tale)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eCritical for cooling; replace sooner after sand\/silt ingestion or overheating.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\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:6px 4px;\"\u003eAnodes (sacrificial)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eInspect every 50 hours; replace when 50% consumed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eChoose alloy for your water (aluminum for most, zinc for salt, magnesium for fresh).\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:18px 0;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\"\u003eMercury Outboard Parts\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-water-pump-repair-kits\"\u003eWater 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 and \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-pumps\"\u003eFuel Pumps\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\u003eLower Unit \/ Sealing – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\"\u003eLower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion \u0026amp; Protection – \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/propeller-guards\"\u003ePropeller Guards\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:18px 0;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%;max-width:920px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eWeak tell‑tale stream \/ overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eInspect intake screens for debris; verify impeller condition and thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eWater pump repair kit, thermostat, intake screen, anodes (corrosion control)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eCheck fresh fuel, choke\/enrichment, spark plug gap, and air leaks in fuel lines.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eSpark plugs, fuel filter, fuel pump, carb service components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eConfirm throttle linkage travel, prop condition\/pitch, and compression.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eFuel filter, spark plugs, propeller, anodes (if excessive fouling)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eGearcase noise or milky gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eDrain and inspect gear oil; look for water intrusion and metal shavings.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 4px;\"\u003eLower unit seal kit, gear oil service supplies, prop 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=\"padding:18px 0;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between 25HP and 30HP models?\u003c\/summary\u003e\n    \u003cp\u003eMany routine service items (impellers, anodes, gearcase seals, some ignition and gaskets) are shared, but carburetor calibration, linkage, and certain gearcase or bracket parts can differ. Always confirm by 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\u003eAs a rule of thumb every 2–3 seasons, or immediately after any overheat event or sand\/silt ingestion. A weak tell‑tale stream is a common indicator of a worn impeller.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change gear oil?\u003c\/summary\u003e\n    \u003cp\u003eAt least annually or every 100 hours. Inspect for water (milky oil) and metal. If contamination is present, service the seals before further operation.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003ePlease provide the full engine serial number (from the bracket plate), horsepower, shaft length, and whether the motor is tiller or remote, manual or electric start, and if it has power trim.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:18px 0;\"\u003e\n  \u003cp\u003eReady to find parts for your Mercury 4‑Stroke 25–30HP? Browse the main Mercury collection and use Filter \u0026amp; Sort to narrow by horsepower, year, and category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;margin-top:8px;padding:10px 14px;border:1px solid #222;border-radius:4px;text-decoration:none;\"\u003eShop Mercury Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px;\"\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":"fuel-injector-fits-mercury-tohatsu-25hp-30hp-4-stroke-replaces-8m0091784-898101t74-3ac-10300-1-3ac-10300-0","title":"100% New Fuel Injector for Mercury Mariner and Tohatsu 25–30 HP 4-Stroke EFI Outboards – Replaces 8M0091784, 898101T74, 3AC-10300-1 and 3AC-10300-0","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 {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis \u003cstrong\u003e100% new aftermarket fuel injector\u003c\/strong\u003e is designed for specified Mercury Mariner and Tohatsu 25–30 HP EFI 4-stroke outboard applications. It provides a direct replacement for the original fuel injector when the part number and complete engine fitment information match.\u003c\/p\u003e\n  \u003cp\u003eFor Mercury applications, the injector replaces manufacturer part numbers \u003cstrong\u003e8M0091784\u003c\/strong\u003e and \u003cstrong\u003e898101T74\u003c\/strong\u003e. For Tohatsu applications, it replaces \u003cstrong\u003e3AC-10300-1\u003c\/strong\u003e and \u003cstrong\u003e3AC-10300-0\u003c\/strong\u003e.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e100% new aftermarket fuel injector; not a used or remanufactured part.\u003c\/li\u003e\n    \u003cli\u003eSold as one individual fuel injector.\u003c\/li\u003e\n    \u003cli\u003eDesigned for gasoline EFI 4-stroke outboard applications listed below.\u003c\/li\u003e\n    \u003cli\u003eConfirm the original part number, engine model, horsepower, stroke, and serial-number range before ordering.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eThe following manufacturer references are associated with this replacement injector. Part-number matching should be used together with the engine fitment information.\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\u003eManufacturer Part Number\u003c\/th\u003e\n          \u003cth\u003eApplication\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\u003e8M0091784\u003c\/td\u003e\n          \u003ctd\u003e25 and 30 HP EFI 4-stroke applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n          \u003ctd\u003e898101T74\u003c\/td\u003e\n          \u003ctd\u003e25 and 30 HP EFI 4-stroke applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eTohatsu\u003c\/td\u003e\n          \u003ctd\u003e3AC-10300-1\u003c\/td\u003e\n          \u003ctd\u003eMFS25 and MFS30 4-stroke applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eTohatsu\u003c\/td\u003e\n          \u003ctd\u003e3AC-10300-0\u003c\/td\u003e\n          \u003ctd\u003eListed manufacturer reference for the specified Tohatsu applications\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\u003eFitment depends on the complete engine configuration. Match the brand, model, horsepower, stroke, and serial-number condition shown below 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 \/ Application\u003c\/th\u003e\n          \u003cth\u003eRated HP\u003c\/th\u003e\n          \u003cth\u003eStroke\u003c\/th\u003e\n          \u003cth\u003eYears \/ Condition\u003c\/th\u003e\n          \u003cth\u003eManufacturer Part Number\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\u003e25 EFI 3-Cylinder\u003c\/td\u003e\n          \u003ctd\u003e25\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2006–2021; up to serial number 1R154757\u003c\/td\u003e\n          \u003ctd\u003e8M0091784\u003cbr\u003e898101T74\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n          \u003ctd\u003e30 EFI 3-Cylinder\u003c\/td\u003e\n          \u003ctd\u003e30\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2006–2021; up to serial number 1R154757\u003c\/td\u003e\n          \u003ctd\u003e8M0091784\u003cbr\u003e898101T74\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eTohatsu\u003c\/td\u003e\n          \u003ctd\u003eMFS25A, MFS25B, MFS25C\u003c\/td\u003e\n          \u003ctd\u003e25\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003eVerify the complete model and serial-number information\u003c\/td\u003e\n          \u003ctd\u003e3AC-10300-1\u003cbr\u003e3AC-10300-0\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eTohatsu\u003c\/td\u003e\n          \u003ctd\u003eMFS30A, MFS30B, MFS30C\u003c\/td\u003e\n          \u003ctd\u003e30\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003eVerify the complete model and serial-number information\u003c\/td\u003e\n          \u003ctd\u003e3AC-10300-1\u003cbr\u003e3AC-10300-0\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\u003eElectronic fuel injector\u003c\/dd\u003e\n    \u003cdt\u003eCondition\u003c\/dt\u003e\n    \u003cdd\u003e100% new aftermarket replacement\u003c\/dd\u003e\n    \u003cdt\u003eFuel System\u003c\/dt\u003e\n    \u003cdd\u003eGasoline electronic fuel injection\u003c\/dd\u003e\n    \u003cdt\u003eEngine Type\u003c\/dt\u003e\n    \u003cdd\u003e4-stroke outboard engines\u003c\/dd\u003e\n    \u003cdt\u003eRated Applications\u003c\/dt\u003e\n    \u003cdd\u003eMercury Mariner and Tohatsu 25–30 HP EFI applications listed above\u003c\/dd\u003e\n    \u003cdt\u003eQuantity\u003c\/dt\u003e\n    \u003cdd\u003eOne fuel injector\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 × 100% new aftermarket fuel injector\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\u003eConfirm the original injector part number and complete engine fitment before beginning work.\u003c\/li\u003e\n    \u003cli\u003eAllow the engine to cool, disconnect the battery, and follow the applicable service manual safety procedures.\u003c\/li\u003e\n    \u003cli\u003eRelieve fuel-system pressure before disconnecting any fuel-system components.\u003c\/li\u003e\n    \u003cli\u003eDisconnect the electrical connector and remove the fuel rail or retaining hardware as specified by the service manual.\u003c\/li\u003e\n    \u003cli\u003eRemove the original injector and inspect the injector seat, retaining hardware, and sealing surfaces.\u003c\/li\u003e\n    \u003cli\u003eInstall the replacement injector with the correct seals and retaining components. Do not reuse damaged seals.\u003c\/li\u003e\n    \u003cli\u003eReinstall the fuel rail and electrical connection, tightening all fasteners to the manufacturer’s specified torque.\u003c\/li\u003e\n    \u003cli\u003ePrime the fuel system and inspect carefully for leaks before starting the engine.\u003c\/li\u003e\n    \u003cli\u003eAfter starting, check again for fuel leaks and confirm stable engine operation.\u003c\/li\u003e\n  \u003c\/ol\u003e\n  \u003cp\u003eProfessional installation is recommended because the procedure involves the pressurized fuel system.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I confirm this injector fits my engine?\u003c\/summary\u003e\n    \u003cp\u003eCompare the original injector’s manufacturer part number with the Part Number Matrix, then verify the brand, model, horsepower, 4-stroke configuration, year range, and serial-number condition in the compatibility table. If any of these details differ, confirm fitment with the engine manufacturer or a qualified marine technician.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this injector new or remanufactured?\u003c\/summary\u003e\n    \u003cp\u003eThis listing is for one 100% new aftermarket fuel injector. It is not a used or remanufactured component.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow many injectors are included?\u003c\/summary\u003e\n    \u003cp\u003eOne individual fuel injector is included. If your engine requires multiple injectors, order the quantity needed for your application.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are common symptoms of a failing fuel injector?\u003c\/summary\u003e\n    \u003cp\u003ePossible symptoms include rough idle, misfire, hard starting, poor acceleration, reduced performance, or increased fuel consumption. These symptoms can also result from other fuel, ignition, or engine problems, so diagnosis is recommended before replacement.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I install the injector myself?\u003c\/summary\u003e\n    \u003cp\u003eInstallation is possible for an experienced technician, but it requires work on the fuel system. Follow the applicable service manual and use professional installation if you are not familiar with fuel-system service.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM injector?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is a 100% new aftermarket replacement. The manufacturer part numbers listed above are reference numbers used to identify the applicable replacement and are not a statement that this product is manufactured by Mercury, Mariner, Nissan, or Tohatsu.\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 part number and complete engine fitment before ordering.\u003c\/li\u003e\n    \u003cli\u003eDo not work on a hot or pressurized fuel system.\u003c\/li\u003e\n    \u003cli\u003eInspect all seals and connections and check carefully for leaks before operating the engine.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement component, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended for safe, leak-free operation.\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\u003eMarine Replacement Parts\u003c\/strong\u003e — We provide replacement components for maintenance and repair of marine engines.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClear Fitment Information\u003c\/strong\u003e — Product references and application conditions are presented to help you verify compatibility before ordering.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAftermarket Value\u003c\/strong\u003e — New replacement parts for practical marine service and repair needs.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723806019899,"sku":"25FUI441","price":67.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/25FUI441_f73b8758-5e93-421f-bd0c-50de9cb6f148.jpg?v=1763032238"},{"product_id":"water-pump-repair-kit-fits-mercury-tohatsu-nissan-25-40-hp-replaces-361873220-853792a07","title":"Water Pump Service Repair Kit Without Housing – Fits Selected Mercury Mariner 25–30 HP \u0026 Tohatsu\/Nissan 25–40 HP","description":"\u003csection\u003e\n\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eWater Pump Service Repair Kit Without Housing\u003c\/strong\u003e is an aftermarket service kit for selected Mercury Mariner and Mercury outboard applications, plus selected Tohatsu and Nissan outboards. It is intended for water-pump service where the existing pump housing is retained and remains suitable for reuse.\u003c\/p\u003e\n\u003cp\u003eThe company fitment records identify Mercury Mariner 25 HP and 30 HP engines by serial number, Mercury 25 HP Sea Pro and EFI applications, and selected Japanese-built Tohatsu\/Nissan models including 25C, 30A, and 40C. Always match the complete engine model, horsepower, stroke, and serial-number condition before ordering.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAftermarket water-pump service kit for selected outboard applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump housing is not included.\u003c\/strong\u003e Inspect the existing housing and related surfaces before installation.\u003c\/li\u003e\n\u003cli\u003eReference numbers include Mercury 46-853792A2, 853792A2, 853792A1, 46-853792T01, 853792A07, and 853792T01, plus Tohatsu references 361-87322-0, 361873220M, 3R0-87322-0, 3R0873220M, and 3NV-87322-0.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse these manufacturer reference numbers as identification aids only. Confirm the engine application and compare the original components before purchase.\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\u003eReference Number\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\u003e46-853792A2\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e853792A2\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e853792A1\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e46-853792T01\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e853792A07\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e853792T01\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu \/ Nissan\u003c\/td\u003e\n\u003ctd\u003e361-87322-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu \/ Nissan\u003c\/td\u003e\n\u003ctd\u003e361873220M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e3R0-87322-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e3R0873220M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e3NV-87322-0\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\u003eFitment is limited to the applications listed below. Model names, horsepower, stroke, and serial-number conditions must be considered together.\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 \/ Serial Condition\u003c\/th\u003e\n        \u003cth\u003eReference Number\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003eMariner 25 HP\u003c\/td\u003e\n        \u003ctd\u003e25\u003c\/td\u003e\n        \u003ctd\u003eNot specified in company record\u003c\/td\u003e\n        \u003ctd\u003eS\/N 0N018456 and above\u003c\/td\u003e\n        \u003ctd\u003e46-853792A2; 853792A2; 853792A1; 46-853792T01; 853792A07; 853792T01\u003c\/td\u003e\n        \u003ctd\u003eSelected application; verify the identification plate.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003eMariner 30 HP\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003eNot specified in company record\u003c\/td\u003e\n        \u003ctd\u003eS\/N 0N001875 and above\u003c\/td\u003e\n        \u003ctd\u003e46-853792A2; 853792A2; 853792A1; 46-853792T01; 853792A07; 853792T01\u003c\/td\u003e\n        \u003ctd\u003eSelected application; verify the identification plate.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Outboard\u003c\/td\u003e\n        \u003ctd\u003eSea Pro\u003c\/td\u003e\n        \u003ctd\u003e25\u003c\/td\u003e\n        \u003ctd\u003eNot specified in company record\u003c\/td\u003e\n        \u003ctd\u003eS\/N 0R051710 and up\u003c\/td\u003e\n        \u003ctd\u003e853792A07\u003c\/td\u003e\n        \u003ctd\u003eConfirm the full model and serial number.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Outboard\u003c\/td\u003e\n        \u003ctd\u003eEFI JET\u003c\/td\u003e\n        \u003ctd\u003e25\u003c\/td\u003e\n        \u003ctd\u003eNot specified in company record\u003c\/td\u003e\n        \u003ctd\u003eS\/N 0R165086 and up\u003c\/td\u003e\n        \u003ctd\u003e853792A07\u003c\/td\u003e\n        \u003ctd\u003eConfirm the full model and serial number.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Outboard\u003c\/td\u003e\n        \u003ctd\u003eEFI Standard\u003c\/td\u003e\n        \u003ctd\u003e25\u003c\/td\u003e\n        \u003ctd\u003eNot specified in company record\u003c\/td\u003e\n        \u003ctd\u003eS\/N 0R106999 and up\u003c\/td\u003e\n        \u003ctd\u003e853792A07\u003c\/td\u003e\n        \u003ctd\u003eConfirm the full model and serial number.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Outboard\u003c\/td\u003e\n        \u003ctd\u003eEFI Standard\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003eNot specified in company record\u003c\/td\u003e\n        \u003ctd\u003eS\/N 0R106999 and up\u003c\/td\u003e\n        \u003ctd\u003e853792A07\u003c\/td\u003e\n        \u003ctd\u003eConfirm the full model and serial number.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu \/ Nissan\u003c\/td\u003e\n        \u003ctd\u003e25C\u003c\/td\u003e\n        \u003ctd\u003e25\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke application listed by company\u003c\/td\u003e\n        \u003ctd\u003eSelected Japanese-built models\u003c\/td\u003e\n        \u003ctd\u003e361-87322-0; 361873220M\u003c\/td\u003e\n        \u003ctd\u003eCompany record also lists the 25C model designation.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu \/ Nissan\u003c\/td\u003e\n        \u003ctd\u003e30A\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke application listed by company\u003c\/td\u003e\n        \u003ctd\u003eSelected Japanese-built models\u003c\/td\u003e\n        \u003ctd\u003e361-87322-0; 361873220M\u003c\/td\u003e\n        \u003ctd\u003eCompany record also lists the 30A model designation.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu \/ Nissan\u003c\/td\u003e\n        \u003ctd\u003e40C\u003c\/td\u003e\n        \u003ctd\u003e40\u003c\/td\u003e\n        \u003ctd\u003eConfirm against the engine identification plate\u003c\/td\u003e\n        \u003ctd\u003eSelected models\u003c\/td\u003e\n        \u003ctd\u003e361-87322-0; 361873220M\u003c\/td\u003e\n        \u003ctd\u003eVerify the exact model and stroke before ordering.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003e25–30 HP Japanese-built models\u003c\/td\u003e\n        \u003ctd\u003e25–30\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke, 2-cylinder\u003c\/td\u003e\n        \u003ctd\u003eInternational models, 2001–2017\u003c\/td\u003e\n        \u003ctd\u003e361-87322-0; 361873220M\u003c\/td\u003e\n        \u003ctd\u003eFitment is limited to the specified Japanese-built applications.\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 service repair kit\u003c\/dd\u003e\n  \u003cdt\u003eHousing\u003c\/dt\u003e\n  \u003cdd\u003eNot included; reuse of the existing housing is required if it is serviceable\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eSelected Mercury Mariner, Mercury, Tohatsu, and Nissan outboard engines\u003c\/dd\u003e\n  \u003cdt\u003eReference Numbers\u003c\/dt\u003e\n  \u003cdd\u003eMercury 46-853792A2, 853792A2, 853792A1, 46-853792T01, 853792A07, 853792T01; Tohatsu\/Nissan 361-87322-0 and 361873220M\u003c\/dd\u003e\n  \u003cdt\u003ePart Type\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat Is Included\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWater pump service repair kit for the listed applications.\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eWater pump housing is not included.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIndividual kit components and quantities are not specified in the company record. Compare the kit with the original assembly before installation and do not assume that a housing or other unlisted component is included.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eConfirm the complete engine model, horsepower, stroke, and serial number before beginning work.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery where applicable and follow the engine manufacturer’s safety procedure.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit according to the service manual for your exact engine.\u003c\/li\u003e\n  \u003cli\u003eRemove the existing water-pump service components and retain the housing only if it is suitable for reuse.\u003c\/li\u003e\n  \u003cli\u003eClean the mating surfaces and inspect the housing, wear surfaces, driveshaft, keyway, and related components for scoring, distortion, or damage.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement service components according to the engine manufacturer’s procedure. Do not force the impeller or reuse damaged fasteners or sealing surfaces.\u003c\/li\u003e\n  \u003cli\u003eReassemble the water pump and lower unit using the manufacturer’s torque specifications and alignment procedure.\u003c\/li\u003e\n  \u003cli\u003eTest the engine in an approved water source and confirm a steady cooling-water tell-tale stream before normal operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I know if this kit fits my engine?\u003c\/summary\u003e\u003cp\u003eMatch your engine brand, exact model designation, horsepower, stroke, and serial number to the compatibility table. Also compare the reference number from your original component. A general horsepower match alone is not sufficient.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this kit include the water-pump housing?\u003c\/summary\u003e\u003cp\u003eNo. The company product records specify a water-pump service kit without the housing for the Mercury applications. Plan to reuse your existing housing only after checking it for wear or damage.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the signs of a failing water pump?\u003c\/summary\u003e\u003cp\u003eCommon symptoms include overheating, a weak or missing tell-tale stream, or an engine warning alarm. During inspection, a cracked, brittle, distorted, or damaged impeller or a scored housing may indicate that water-pump service is needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this an OEM or aftermarket part?\u003c\/summary\u003e\u003cp\u003eThis is an aftermarket replacement service kit. The listed manufacturer numbers are reference numbers used to help identify the intended application; this product is not represented as an original OEM component.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eShould I replace the housing with the service kit?\u003c\/summary\u003e\u003cp\u003eThe housing is not included. Inspect the existing housing and replace it separately if it is worn, scored, distorted, or otherwise unsuitable for reuse.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should a water-pump service be performed?\u003c\/summary\u003e\u003cp\u003eService intervals depend on the engine manufacturer’s maintenance schedule and operating conditions. Inspect the cooling system regularly, especially after operation in sandy, silty, or saltwater environments, and service it when inspection or symptoms indicate wear.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the exact model, horsepower, stroke, and serial-number range before purchase.\u003c\/li\u003e\n  \u003cli\u003eCompare the original component and reference number with the information above.\u003c\/li\u003e\n  \u003cli\u003eThe water-pump housing is not included.\u003c\/li\u003e\n  \u003cli\u003eUse the service manual for your exact engine and follow all torque, sealing, alignment, and testing procedures.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when lower-unit removal or water-pump 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-Focused Parts\u003c\/strong\u003e — We supply replacement components for a range of outboard maintenance applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Based Listings\u003c\/strong\u003e — Product information is organized around model, horsepower, stroke, serial-number, and reference-number details.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAftermarket Value\u003c\/strong\u003e — Replacement parts are offered as practical alternatives for routine marine service and repair.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723806052667,"sku":"22KT025","price":42.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Repair_Kit_for_Mercury_-_Tohatsu_Nissan_25-40_HP_361873220_-_JLM_MARINE-8288304.jpg?v=1763032239"}],"url":"https:\/\/seasierra.com\/collections\/mercury-4-stroke-25-30hp-outboard-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}