{"product_id":"water-pump-repair-kit-fits-yamaha-4-2l-v6-225-350hp-replaces-6ce-w0078-01-00-6ce-w0078-02-00","title":"Water Pump Repair Kit – Fits Yamaha 4.2L V6 225-350HP (Replaces 6CE-W0078-01-00, 6CE-W0078-02-00)","description":"\u003csection\u003e\n\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\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eWater Pump Repair Kit - Fits Yamaha 4.2L V6 225HP-300HP (Replaces 6CE-W0078-01-00, 6CE-W0078-02-00)\u003c\/strong\u003e is designed for Yamaha 4-Stroke 225HP, 250HP, 300HP, and 350HP (F225, F250, F300, F350) 4.2L V6 outboard engines from 2007–2015, also fitting the VF250 SHO (2015). It contains all necessary components to restore the engine's cooling system.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct replacement for Yamaha part numbers 6CE-W0078-01-00 and 6CE-W0078-02-00, as well as Sierra equivalents 18-3470 and 18-3471.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInstalls in the lower unit of the outboard motor.\u003c\/li\u003e\n  \u003cli\u003eIncludes all essential gaskets, seals, and the impeller.\u003c\/li\u003e\n  \u003cli\u003eEngineered to meet or exceed original equipment specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\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\u003e6CE-W0078-01-00\u003c\/td\u003e\n        \u003ctd\u003eSuperseded by 6CE-W0078-02-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6CE-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003eCurrent OEM Part Number\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3470\u003c\/td\u003e\n        \u003ctd\u003eAftermarket equivalent\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3471\u003c\/td\u003e\n        \u003ctd\u003eAftermarket equivalent\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\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eFor Yamaha owners, please verify your engine's model code (e.g., F225, LF250) and production year fall within the specified range for a guaranteed fit.\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      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF225\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2010–2015\u003c\/td\u003e\n\u003ctd\u003e6CE-W0078-01-00\/6CE-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF250\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2010–2015\u003c\/td\u003e\n\u003ctd\u003e6CE-W0078-01-00\/6CE-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eFL250\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003e6CE-W0078-01-00\/6CE-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eLF225\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2010–2015\u003c\/td\u003e\n\u003ctd\u003e6CE-W0078-01-00\/6CE-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eLF250\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2010–2015\u003c\/td\u003e\n\u003ctd\u003e6CE-W0078-01-00\/6CE-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eVF250\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003ctd\u003e6CE-W0078-01-00\/6CE-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF300\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2007–2015\u003c\/td\u003e\n\u003ctd\u003e6CE-W0078-01-00\/6CE-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eFL300\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003e6CE-W0078-01-00\/6CE-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eLF300\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2007–2015\u003c\/td\u003e\n\u003ctd\u003e6CE-W0078-01-00\/6CE-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF350\u003c\/td\u003e\n\u003ctd\u003e350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2007–2015\u003c\/td\u003e\n\u003ctd\u003e6CE-W0078-01-00\/6CE-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eFL350\u003c\/td\u003e\n\u003ctd\u003e350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003e6CE-W0078-01-00\/6CE-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eLF350\u003c\/td\u003e\n\u003ctd\u003e350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2007–2015\u003c\/td\u003e\n\u003ctd\u003e6CE-W0078-01-00\/6CE-W0078-02-00\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 Repair Kit\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eLower Unit\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x Impeller\u003c\/span\u003e (6CE-44352-00-00)\u003c\/li\u003e\n    \u003cli\u003e1 x Key\/Woodruff Key (90280-04M05-00\/90280-04002-00)\u003c\/li\u003e\n    \u003cli\u003e1 x O-Ring (93210-94003-00)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e4 x Bolt\u003c\/span\u003e (97095-08045-00\/90119-08191-00)\u003c\/li\u003e\n    \u003cli\u003e2 x Seal, Oil (93104-22M07-00)\u003c\/li\u003e\n    \u003cli\u003e1 x Insert\/Cartridge (6AW-44322-00-00)\u003c\/li\u003e\n    \u003cli\u003e1 x Outer Plate\/Cartridge Plate (6CE-44323-01-00)\u003c\/li\u003e\n    \u003cli\u003e1 x Water Pump Gasket (6CE-44315-00-00)\u003c\/li\u003e\n    \u003cli\u003e2 x Dowel Pin (93606-12019-00)\u003c\/li\u003e\n    \u003cli\u003e1 x O-Ring (93210-37M67-00)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery and shift the outboard into neutral.\u003c\/li\u003e\n  \u003cli\u003eDrain the lower unit gearcase oil completely.\u003c\/li\u003e\n  \u003cli\u003eRemove the bolts securing the lower unit (gearcase) and carefully separate it from the upper housing.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and remove the old water pump housing assembly from the driveshaft.\u003c\/li\u003e\n  \u003cli\u003eClean the driveshaft and mounting surfaces, removing any old gasket material or corrosion.\u003c\/li\u003e\n  \u003cli\u003eInstall the new woodruff key, impeller, gaskets, and seals from the kit as per the manufacturer's diagram. Ensure the impeller vanes are oriented correctly.\u003c\/li\u003e\n  \u003cli\u003eInstall the new housing, cartridge, and plate, tightening bolts to the specified torque.\u003c\/li\u003e\n  \u003cli\u003eRe-install the lower unit, ensuring the driveshaft, shift shaft, and water tube align correctly.\u003c\/li\u003e\n  \u003cli\u003eRefill the gearcase with fresh oil and test the engine using a water supply (flushing muffs) to verify proper cooling system 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 specific Yamaha engine model?\u003c\/summary\u003e\u003cp\u003eCheck your engine's model, rated horsepower, and year against our compatibility table. This kit is specifically for Yamaha 4.2L V6 models (e.g., F225, F300, LF350) made between 2007 and 2015. If your model and year are listed, the kit will fit.\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 the engine running hotter than normal or overheating, a weak or intermittent water stream from the tell-tale indicator outlet, and a steam or vapor coming from the exhaust. An audible alarm or warning light on your console may also activate.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat's the difference between part numbers 6CE-W0078-01-00 and 6CE-W0078-02-00?\u003c\/summary\u003e\u003cp\u003eThe part number 6CE-W0078-02-00 is a supersession, meaning it is the newer, updated version that replaces the older 6CE-W0078-01-00. They are functionally identical and fully interchangeable. This kit is designed to replace both versions.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should I replace my engine's water pump impeller?\u003c\/summary\u003e\u003cp\u003eFor preventative maintenance, it is recommended to inspect the water pump and replace the impeller at least every two years or every 200 hours of operation, whichever comes first. In saltwater or sandy\/silty conditions, yearly inspection and replacement is a safer interval.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eMy engine is still overheating after installing the new kit. What could be wrong?\u003c\/summary\u003e\u003cp\u003eFirst, confirm the impeller vanes were correctly oriented during installation (they should curve against the direction of driveshaft rotation). Second, ensure all gaskets and seals are seated properly to create a perfect seal, as air leaks will prevent the pump from priming. Lastly, check for any blockages in the cooling water intake or the tell-tale outlet.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhy is this an aftermarket part instead of an OEM part?\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\u003eWhat are the shipping speed and 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\u003eWhat is the warranty and return policy?\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\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\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":50723799302459,"sku":"23KY100","price":29.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_V6_42L_225HP-300HP_6CE-W0078-01_-_JLM_MARINE-8289110.jpg?v=1763032108","url":"https:\/\/seasierra.com\/products\/water-pump-repair-kit-fits-yamaha-4-2l-v6-225-350hp-replaces-6ce-w0078-01-00-6ce-w0078-02-00","provider":"SeaSierra","version":"1.0","type":"link"}