{"product_id":"water-pump-impeller-repair-kit-fits-yamaha-70-hp-f70a-4-stroke-replaces-6cj-w0078-00-00-6cj-w0078-01-00","title":"Water Pump Impeller Repair Kit – Fits Yamaha 70 HP F70A 4-Stroke (Replaces 6CJ-W0078-00-00, 6CJ-W0078-01-00)","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 \u003cstrong\u003eWater Pump Impeller Repair Kit\u003c\/strong\u003e is designed for Yamaha 70 HP F70A 4-stroke outboard motors manufactured from 2010 to 2021. It fits models with serial numbers beginning with 6D7, ensuring broad compatibility within this engine series.\u003c\/p\u003e\n\u003cp\u003eThis kit serves as a direct replacement for Yamaha part numbers 6CJ-W0078-00-00 and 6CJ-W0078-01-00, as well as Sierra 18-3494 and KUNOANZ KU-002017.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstallation is a direct replacement, requiring access to the lower unit.\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary gaskets, seals, and hardware for a complete service.\u003c\/li\u003e\n\u003cli\u003eEngineered with durable plastic and metal components for reliability.\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        \u003cth\u003eSuperseded By\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\u003e6CJ-W0078-00-00\u003c\/td\u003e\n        \u003ctd\u003e6CJ-W0078-01-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6CJ-W0078-01-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3494\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eKUNOANZ\u003c\/td\u003e\n        \u003ctd\u003eKU-002017\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\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\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\u003eF70LA\u003c\/td\u003e\n        \u003ctd\u003e70\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2010–2021\u003c\/td\u003e\n        \u003ctd\u003e6CJ-W0078-00-00, 6CJ-W0078-01-00\u003c\/td\u003e\n        \u003ctd\u003eModels with serial numbers starting with 6D7\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF70A, AET\u003c\/td\u003e\n        \u003ctd\u003e70\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2011–2015\u003c\/td\u003e\n        \u003ctd\u003e6CJ-W0078-00-00\u003c\/td\u003e\n        \u003ctd\u003eSerial numbers 6D71-6D79, 6D7A-6D7C\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 replacement; requires access to lower unit\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003ePlastic and metal components\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlack\/Silver\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eDirect fit\u003c\/dd\u003e\n  \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e1 Year (Aftermarket)\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eComplete water pump service kit including gaskets, seals, and hardware\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 Cover, Water Pump Housing (63D-44312-00\/18-9083)\u003c\/li\u003e\n  \u003cli\u003e1 x Cup, Insert (63D-44322-00\/18-3449)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e Seal, Water Damper (663-44366-00\/18-1830)\u003c\/li\u003e\n  \u003cli\u003e1 x Gasket, Water Pump (6CJ-44315-00\/18-0448)\u003c\/li\u003e\n  \u003cli\u003e1 x Gasket, Water Pump (6CJ-44316-00\/18-0449)\u003c\/li\u003e\n  \u003cli\u003e1 x Gasket, Water Pump (6CJ-44324-00\/18-0450)\u003c\/li\u003e\n  \u003cli\u003e1 x Plate, Wear (6CJ-44323-00\/18-3186)\u003c\/li\u003e\n  \u003cli\u003e1 x Impeller (6H3-44352-00\/18-3069)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e Bolt, With Washer (90119-08M14)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e Bolt, With Washer (90119-08M33\/18-0260)\u003c\/li\u003e\n  \u003cli\u003e1 x Key, Woodruff (697) (90280-03M03\/18-3297)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e Oil Seal (663) (93101-23070\/18-0297)\u003c\/li\u003e\n  \u003cli\u003e1 x O-Ring (93210-46044\/18-7436)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e Pin, Dowel (688) (93604-10M03\/18-43717)\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 shift the outboard to neutral.\u003c\/li\u003e\n\u003cli\u003eRemove the lower unit (gearcase) from the engine.\u003c\/li\u003e\n\u003cli\u003eUnbolt and remove the old water pump housing and its components.\u003c\/li\u003e\n\u003cli\u003eCarefully inspect, clean, and remove the old impeller, gaskets, seals, and wear plate.\u003c\/li\u003e\n\u003cli\u003eInstall the new components from the kit in the reverse order of removal, ensuring correct orientation.\u003c\/li\u003e\n\u003cli\u003eLightly grease the new impeller and inside of the housing to prevent damage on initial startup.\u003c\/li\u003e\n\u003cli\u003eReinstall the pump housing and torque bolts to manufacturer specifications.\u003c\/li\u003e\n\u003cli\u003eReattach the lower unit, ensuring all shift and drive shaft connections are secure.\u003c\/li\u003e\n\u003cli\u003eStart the engine using a water supply (flushing muffs) and verify a steady stream 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\u003csummary\u003eHow do I know if this kit fits my Yamaha F70A?\u003c\/summary\u003e\u003cp\u003eThis kit is designed for Yamaha F70A 4-stroke models from 2010–2021. Check your engine's serial number; it is specifically compatible with models starting with 6D7. You can also compare your existing part numbers to those listed in the Part Number Matrix.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the signs my water pump needs to be replaced?\u003c\/summary\u003e\u003cp\u003eCommon signs of a failing water pump include the engine overheating, a weak or inconsistent stream of water from the \"telltale\" outlet, or visible damage to the old impeller such as cracked, brittle, or missing vanes.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should I replace my water pump impeller?\u003c\/summary\u003e\u003cp\u003eFor preventative maintenance, it is recommended to inspect your water pump annually and replace the impeller and gaskets every 1–2 years or every 100–200 hours of use, depending on operating conditions (e.g., saltwater vs. freshwater).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat's the difference between this kit and an OEM Yamaha kit?\u003c\/summary\u003e\u003cp\u003eThis is an aftermarket kit designed to meet or exceed OEM specifications. It includes all the necessary components for a full replacement at a more competitive price point, using high-quality materials for reliable performance.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\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\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\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\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":50723982082363,"sku":"GH-17KY003","price":43.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/GH-17KY003.png?v=1763039293","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-repair-kit-fits-yamaha-70-hp-f70a-4-stroke-replaces-6cj-w0078-00-00-6cj-w0078-01-00","provider":"SeaSierra","version":"1.0","type":"link"}