{"product_id":"water-pump-impeller-repair-kit-fits-yamaha-9-9-15-hp-replaces-63v-w0078-01-00","title":"Water Pump Impeller Repair Kit – Fits Yamaha 9.9\/15 HP (Replaces 63V-W0078-01-00)","description":"\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\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 \u003cstrong\u003eWater Pump Impeller Repair Kit – Fits Yamaha 9.9\/15 HP (1996-2024)\u003c\/strong\u003e is designed for a wide range of Yamaha 9.9 HP and 15 HP, 2-stroke and 4-stroke, 2-cylinder outboard engines manufactured between 1996 and 2024. The kit provides all essential components for a complete and reliable water pump service.\u003c\/p\u003e\n    \u003cp\u003eIt serves as a direct replacement for multiple OEM and aftermarket part numbers, including Yamaha 63V-W0078-00-00, 63V-W0078-01-00, 63V-W0078-02-00, 63V-W0078-03-00, Sierra 18-3433, and Mallory 9-48609.\u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003eInstallation is a direct OEM replacement.\u003c\/li\u003e\n        \u003cli\u003eKit includes a new impeller, housing plate, and all necessary gaskets.\u003c\/li\u003e\n        \u003cli\u003eEngineered for fresh and salt water environments.\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 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\u003e63V-W0078-00-00\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eYamaha\u003c\/td\u003e\n                    \u003ctd\u003e63V-W0078-01-00\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eYamaha\u003c\/td\u003e\n                    \u003ctd\u003e63V-W0078-02-00\u003c\/td\u003e\n                \u003c\/tr\u003e\n                 \u003ctr\u003e\n                    \u003ctd\u003eYamaha\u003c\/td\u003e\n                    \u003ctd\u003e63V-W0078-03-00\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eSierra\u003c\/td\u003e\n                    \u003ctd\u003e18-3433\u003c\/td\u003e\n                \u003c\/tr\u003e\n                 \u003ctr\u003e\n                    \u003ctd\u003eSierra\u003c\/td\u003e\n                    \u003ctd\u003e18-3412\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMallory\u003c\/td\u003e\n                    \u003ctd\u003e9-48609\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMallory\u003c\/td\u003e\n                    \u003ctd\u003e9-48617\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\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n    \u003cp\u003eFor Yamaha Outboards: This kit fits various 2-cylinder, 2-stroke and 4-stroke models from 9.9 HP to 15 HP. Please verify your specific model and year range.\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\u003e9.9\u003c\/td\u003e\n                    \u003ctd\u003e9.9\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1996–2024\u003c\/td\u003e\n                    \u003ctd\u003e63V-W0078-01-00\u003c\/td\u003e\n                    \u003ctd\u003e2 cylinder models\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eYamaha\u003c\/td\u003e\n                    \u003ctd\u003e15\u003c\/td\u003e\n                    \u003ctd\u003e15\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1996–2024\u003c\/td\u003e\n                    \u003ctd\u003e63V-W0078-01-00\u003c\/td\u003e\n                    \u003ctd\u003e2 cylinder models\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eYamaha\u003c\/td\u003e\n                    \u003ctd\u003eF9.9\u003c\/td\u003e\n                    \u003ctd\u003e9.9\u003c\/td\u003e\n                    \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e2005–2006\u003c\/td\u003e\n                    \u003ctd\u003e63V-W0078-01-00\u003c\/td\u003e\n                    \u003ctd\u003e2 cylinder models\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eYamaha\u003c\/td\u003e\n                    \u003ctd\u003eT9.9\u003c\/td\u003e\n                    \u003ctd\u003e9.9\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1996–2009\u003c\/td\u003e\n                    \u003ctd\u003e63V-W0078-01-00\u003c\/td\u003e\n                    \u003ctd\u003e2 cylinder models\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eYamaha\u003c\/td\u003e\n                    \u003ctd\u003eF15\u003c\/td\u003e\n                    \u003ctd\u003e15\u003c\/td\u003e\n                    \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1998–2005\u003c\/td\u003e\n                    \u003ctd\u003e63V-W0078-01-00\u003c\/td\u003e\n                    \u003ctd\u003e2 cylinder 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\u003eWater Pump Impeller Repair Kit\u003c\/dd\u003e\n        \u003cdt\u003eInstallation\u003c\/dt\u003e\n        \u003cdd\u003eDirect OEM replacement\u003c\/dd\u003e\n        \u003cdt\u003eHousing Color\u003c\/dt\u003e\n        \u003cdd\u003eGreen\u003c\/dd\u003e\n        \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n        \u003cdd\u003eSuitable for salt water use\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 Water Pump Impeller (63V-44352-00-00\/63V-44352-01-00)\u003c\/li\u003e\n        \u003cli\u003e1 x Housing Gasket\u003c\/li\u003e\n        \u003cli\u003e1 x Housing Plate\u003c\/li\u003e\n        \u003cli\u003e1 x Upper Gasket\u003c\/li\u003e\n        \u003cli\u003e1 x Lower Gasket\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 spark plug wires and shift the outboard into neutral.\u003c\/li\u003e\n        \u003cli\u003eRemove the propeller and locate the lower unit mounting bolts.\u003c\/li\u003e\n        \u003cli\u003eCarefully detach the lower unit from the engine housing to access the water pump.\u003c\/li\u003e\n        \u003cli\u003eUnscrew the bolts on the water pump housing and remove it.\u003c\/li\u003e\n        \u003cli\u003eTake note of the old impeller's orientation before removing it.\u003c\/li\u003e\n        \u003cli\u003eClean all mating surfaces and install the new gaskets, plate, and impeller.\u003c\/li\u003e\n        \u003cli\u003eEnsure the impeller vanes are oriented correctly (typically by turning the driveshaft clockwise during installation).\u003c\/li\u003e\n        \u003cli\u003eReinstall the water pump housing, torquing bolts to manufacturer specifications.\u003c\/li\u003e\n        \u003cli\u003eRe-attach the lower unit to the engine, ensuring all linkages are properly connected.\u003c\/li\u003e\n        \u003cli\u003eOnce assembled, test the engine in water to verify proper water flow from the tell-tale outlet.\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 confirm this kit fits my specific Yamaha engine?\u003c\/summary\u003e\n        \u003cp\u003eThis kit is for Yamaha 9.9 HP and 15 HP 2-cylinder outboards (1996-2024). The surest way to confirm fitment is by matching your existing OEM part number to one listed in our Part Number Matrix, such as 63V-W0078-01-00. Also, check your engine model against our compatibility table.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWhat are the signs of a failing water pump impeller?\u003c\/summary\u003e\n        \u003cp\u003eCommon symptoms include a weak or non-existent water stream from the \"tell-tale\" outlet, engine overheating alarms, or visible cracks and brittleness on the old impeller's vanes during inspection.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eHow often should I replace my water pump impeller?\u003c\/summary\u003e\n        \u003cp\u003eFor preventative maintenance, it is recommended to inspect and\/or replace the impeller every one to two years, or every 100-200 hours of use, depending on operating conditions (e.g., more frequently in sandy or silty water).\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eIs this kit difficult to install myself?\u003c\/summary\u003e\n        \u003cp\u003eInstallation requires basic mechanical skills and tools to drop the lower unit. While many boat owners perform this service, we recommend professional installation if you are not comfortable with the process to ensure safety and correct function.\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\u003c\/section\u003e\n\u003csection\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\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 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":50723777151291,"sku":"GH-17KY013","price":25.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/GH-17KY013.png?v=1763031555","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-repair-kit-fits-yamaha-9-9-15-hp-replaces-63v-w0078-01-00","provider":"SeaSierra","version":"1.0","type":"link"}