{"product_id":"water-pump-repair-kit-fits-yamaha-25-30hp-outboards-replaces-yamaha-61n-w0078-11-00-sierra-18-3432","title":"Water Pump Repair Kit – Fits Yamaha 25-30HP Outboards (Replaces Yamaha 61N-W0078-11-00, Sierra 18-3432)","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;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\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 comprehensive \u003cstrong\u003eYamaha Water Pump Repair Kit\u003c\/strong\u003e includes the housing and all necessary components for a complete lower unit service. It is designed to fit Yamaha 4-Stroke F25, F25A, and F25B outboards (25HP, 1998–2017) and 2-Stroke C30 models (30HP, 1993–1997).\u003c\/p\u003e\n\u003cp\u003eThe kit serves as a direct interchange for Yamaha part numbers 61N-W0078-00-00 through 61N-W0078-14-00, and Sierra 18-3432, ensuring broad compatibility for the specified engines.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls in the lower unit to restore cooling system performance.\u003c\/li\u003e\n\u003cli\u003eIncludes a new housing for a complete and reliable repair.\u003c\/li\u003e\n\u003cli\u003eEngineered with a marine-grade corrosion-resistant metal alloy housing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\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\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e61N-W0078-14-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e61N-W0078-13-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e61N-W0078-11-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e61N-W0078-10-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e61N-W0078-01-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e61N-W0078-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3432\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF25\u003c\/td\u003e\n        \u003ctd\u003e25\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1998–2017\u003c\/td\u003e\n        \u003ctd\u003e61N-W0078-11-00\u003c\/td\u003e\n        \u003ctd\u003eIncludes F25A and F25B variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eC30\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1993–1997\u003c\/td\u003e\n        \u003ctd\u003e61N-W0078-11-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eOutboard Water Pump Repair Kit with Housing\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eLower Unit\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eMarine-grade corrosion-resistant metal alloy\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eSilver\/Metallic\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e238g (8.4 oz)\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eDirect fit to specified engines\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eIncludes housing for complete water pump service\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Water Pump Impeller (6H4-44352-00)\u003c\/li\u003e\n\u003cli\u003e1 x Key, Woodruff (90280-03M03-00)\u003c\/li\u003e\n\u003cli\u003e1 x Housing, Water Pump (61N-44311-01-00)\u003c\/li\u003e\n\u003cli\u003e1 x Cartridge Outer Plate (61N-44323-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x Insert Cup (61N-44322-01-00)\u003c\/li\u003e\n\u003cli\u003e1 x O-Ring (9310-45161-00)\u003c\/li\u003e\n\u003cli\u003e1 x Water Seal (6L2-44367-00-00)\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e4 x Bolt (97095-06040-00)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eDisconnect the battery and remove the propeller for safety.\u003c\/li\u003e\n\u003cli\u003eDrain the lower unit gear oil.\u003c\/li\u003e\n\u003cli\u003eUnbolt and carefully remove the lower unit from the outboard's midsection.\u003c\/li\u003e\n\u003cli\u003eLocate the water pump housing on the top of the lower unit and remove its mounting bolts.\u003c\/li\u003e\n\u003cli\u003eRemove the old housing, impeller, cup, plate, and seals. Clean the mounting surfaces thoroughly.\u003c\/li\u003e\n\u003cli\u003eInstall the new components from the kit in the reverse order of removal. Ensure the impeller key is correctly seated.\u003c\/li\u003e\n\u003cli\u003eLightly grease the new impeller and inside the pump cup for easier initial startup.\u003c\/li\u003e\n\u003cli\u003eReinstall the water pump housing, torquing the bolts to the manufacturer's specification.\u003c\/li\u003e\n\u003cli\u003eReattach the lower unit to the midsection and refill with fresh gear oil.\u003c\/li\u003e\n\u003cli\u003eReconnect the battery and test the engine in a suitable water supply to confirm proper water flow.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow can I confirm this kit fits my exact engine model?\u003c\/summary\u003e\n  \u003cp\u003eThe surest way is to check your engine's model name and year. This kit is specifically for Yamaha 4-Stroke F25\/F25A\/F25B (1998–2017) and 2-Stroke C30 (1993–1997). You can also cross-reference your existing part number with those listed in the Part Number Matrix.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failing water pump?\u003c\/summary\u003e\n  \u003cp\u003eCommon symptoms include a weak or intermittent water stream from the \"tell-tale\" outlet, engine overheating alarms, and reduced engine performance. A worn impeller is the most frequent cause.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should the water pump impeller be replaced?\u003c\/summary\u003e\n  \u003cp\u003eAs a general maintenance rule, it's recommended to inspect and\/or replace the impeller every 1-2 years or every 100-200 hours of use, depending on operating conditions (e.g., saltwater vs. freshwater).\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n    \u003csummary\u003eWhy is replacing the full kit, including the housing, important?\u003c\/summary\u003e\n    \u003cp\u003eThe housing and insert cup can wear over time from abrasion, creating a less effective seal. Replacing the entire assembly ensures the new impeller operates at peak efficiency and provides optimal water pressure, extending the life of the repair.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs any grease or sealant required for installation?\u003c\/summary\u003e\n  \u003cp\u003eYes, it is highly recommended to apply a light coat of marine grease to the new impeller and the inside of the pump cup. This lubricates the impeller on its first dry start and helps it seal correctly. No other sealant is typically needed for the main housing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n\u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723800416571,"sku":"20KY002R(少黑色配件）","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/20KY002R.png?v=1763032144","url":"https:\/\/seasierra.com\/products\/water-pump-repair-kit-fits-yamaha-25-30hp-outboards-replaces-yamaha-61n-w0078-11-00-sierra-18-3432","provider":"SeaSierra","version":"1.0","type":"link"}