{"product_id":"water-pump-impeller-kit-fits-yamaha-8-9-9hp-4-stroke-outboard-replaces-69g-w0078-02-00-18-3450-9-48613","title":"Water Pump Impeller Kit – Fits Yamaha 8\/9.9HP 4-Stroke Outboard (Replaces 69G-W0078-02-00, 18-3450, 9-48613)","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 Kit – Fits Yamaha 8\/9.9HP 4-Stroke Outboard (Replaces 69G-W0078-02-00)\u003c\/strong\u003e provides all necessary components for a complete water pump service. It is designed for Yamaha 4-stroke outboard motors, including 8 HP and 9.9 HP high-thrust models (T8, T9.9) from 2007 and newer, ensuring your engine's cooling system operates efficiently.\u003c\/p\u003e\n\u003cp\u003eThis kit is a direct interchange for Yamaha part numbers 69G-W0078-00-00, 69G-W0078-01-00, and 69G-W0078-02-00, as well as Sierra 18-3450 and Mallory 9-48613.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls in the lower unit.\u003c\/li\u003e\n\u003cli\u003eMaintains proper cooling system function to prevent overheating.\u003c\/li\u003e\n\u003cli\u003eKit includes a new impeller, housing insert, plate, key, and all required seals and bolts.\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        \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\u003e69G-W0078-00-00\u003c\/td\u003e\n        \u003ctd\u003e69G-W0078-01-00\u003c\/td\u003e\n        \u003ctd\u003eOriginal superseded part\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e69G-W0078-01-00\u003c\/td\u003e\n        \u003ctd\u003e69G-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003ePrevious version\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e69G-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003e\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\u003e18-3450\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eAftermarket equivalent\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMallory\u003c\/td\u003e\n        \u003ctd\u003e9-48613\u003c\/td\u003e\n        \u003ctd\u003e\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\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 owners, this kit is primarily for T8 and T9.9 high-thrust models but also fits specific F25 and C30 legacy engines. Please verify your exact model and year.\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\u003eFT8DEPL, FT8DEPX\u003c\/td\u003e\n        \u003ctd\u003e8\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2001\u003c\/td\u003e\n        \u003ctd\u003e69G-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003eHigh thrust models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eFT8DMHL\u003c\/td\u003e\n        \u003ctd\u003e8\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2003–2004\u003c\/td\u003e\n        \u003ctd\u003e69G-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003eHigh thrust model\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eFT9.9GEL, FT9.9GEPL, FT9.9GEX\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2008–2012\u003c\/td\u003e\n        \u003ctd\u003e69G-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003eHigh thrust models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eFT9.9LEL, FT9.9LEPL, FT9.9LEX\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2013–2017\u003c\/td\u003e\n        \u003ctd\u003e69G-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003eHigh thrust models\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eFT9.9LPB, FT9.9XPB\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2018+\u003c\/td\u003e\n        \u003ctd\u003e69G-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003eHigh thrust 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\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eApril 2007 and newer\u003c\/td\u003e\n        \u003ctd\u003e69G-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003eHigh thrust models\u003c\/td\u003e\n      \u003c\/tr\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\u003e1998–2005, 2009–2010\u003c\/td\u003e\n        \u003ctd\u003e69G-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003eAdditional compatibility\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\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1993–1997\u003c\/td\u003e\n        \u003ctd\u003e69G-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003eAdditional compatibility\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\u003eLower Unit\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eDirect Drive\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eMaintains proper cooling system function\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 Cartridge Insert (63V-44322-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x Impeller (63V-44352-01-00)\u003c\/li\u003e\n\u003cli\u003e1 x Woodruff Key (664-44338-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x Outer Plate, Cartridge (68T-44323-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x Damper, Water Seal (68T-44366-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x O-Ring (93210-44704-00)\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e4 x Bolt, Hexagon (97080-08045-00 \/ 97095-08045-00)\u003c\/span\u003e\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 leads and shift the outboard into neutral.\u003c\/li\u003e\n\u003cli\u003ePlace a drain pan under the lower unit and remove the gear lube drain screw to empty the oil.\u003c\/li\u003e\n\u003cli\u003eRemove the bolts securing the lower unit (gearcase) to the upper leg of the outboard.\u003c\/li\u003e\n\u003cli\u003eCarefully separate the lower unit from the driveshaft housing. Be mindful of the shift shaft.\u003c\/li\u003e\n\u003cli\u003eUnscrew the bolts on the water pump housing cover and lift it off.\u003c\/li\u003e\n\u003cli\u003eSlide the old impeller off the driveshaft, removing the Woodruff key. Note the rotational direction of the old impeller vanes.\u003c\/li\u003e\n\u003cli\u003eClean any debris, salt, or corrosion from the housing, base plate, and driveshaft.\u003c\/li\u003e\n\u003cli\u003eInstall the new Woodruff key, then slide the new impeller onto the shaft while turning the driveshaft clockwise to seat the vanes correctly.\u003c\/li\u003e\n\u003cli\u003eInstall the new cartridge, plate, and seals from the kit.\u003c\/li\u003e\n\u003cli\u003eRe-install the water pump housing and tighten the bolts to the manufacturer's specified torque.\u003c\/li\u003e\n\u003cli\u003eReattach the lower unit, ensuring the driveshaft, shift shaft, and water tube are correctly aligned. Tighten bolts to spec.\u003c\/li\u003e\n\u003cli\u003eRefill the lower unit with fresh gear lube before starting the engine.\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\u003eWill this kit fit my 2015 Yamaha T9.9LEX?\u003c\/summary\u003e\u003cp\u003eYes, based on the compatibility chart, this kit is the correct replacement for Yamaha T9.9 models from 2013–2017, including the T9.9LEX high-thrust model.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow can I tell if my water pump impeller is failing?\u003c\/summary\u003e\u003cp\u003eCommon signs include a weak or intermittent water stream from the \"telltale\" outlet, the engine overheating alarm sounding, or visible steam from the exhaust. A physical inspection showing cracked, brittle, or missing impeller vanes confirms it needs replacement.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat's the difference between part number 69G-W0078-01-00 and 69G-W0078-02-00?\u003c\/summary\u003e\u003cp\u003ePart number 69G-W0078-02-00 is the latest version that supersedes 69G-W0078-01-00. They are functionally identical for the listed models, but the newer part may include minor material or design updates from the original manufacturer.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should I replace my outboard's impeller?\u003c\/summary\u003e\u003cp\u003eAs a preventative maintenance item, it is recommended to replace the impeller every 1-2 years or every 100-200 hours of operation, whichever comes first. Usage in saltwater or sandy\/silty conditions may require more frequent changes.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eThe kit includes two part numbers for the bolts. Which one do I use?\u003c\/summary\u003e\u003cp\u003eThe two bolt part numbers (97080-08045-00 and 97095-08045-00) are functionally interchangeable for this application. Manufacturers often have multiple part numbers for the same hardware from different suppliers. All four included bolts will fit correctly.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I buy just the impeller instead of the whole kit?\u003c\/summary\u003e\u003cp\u003eWhile impellers are available separately, it is best practice to replace the entire kit. Related components like the housing insert, plate, and seals wear over time and can cause a new impeller to fail prematurely if not also replaced.\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\u003ePro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n\u003cli\u003eFast Global Fulfillment — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n\u003cli\u003eManufacturer-Direct Value — 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":50723985785147,"sku":"26KY001","price":48.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_8_99HP_69G-W0078-02_-_JLM_MARINE-8289127.jpg?v=1763039456","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-kit-fits-yamaha-8-9-9hp-4-stroke-outboard-replaces-69g-w0078-02-00-18-3450-9-48613","provider":"SeaSierra","version":"1.0","type":"link"}