{"product_id":"water-pump-impeller-repair-kit-fits-yamaha-8hp-9-9hp-replaces-68t-w0078-00-00-18-3450","title":"Water Pump Impeller Repair Kit – Fits Yamaha 8HP\/9.9HP (Replaces 68T-W0078-00-00, 18-3450)","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 is a complete \u003cstrong\u003eWater Pump Impeller Repair Kit – Fits Yamaha 8HP\/9.9HP Outboards (Replaces 68T-W0078-00-00)\u003c\/strong\u003e, designed for Yamaha 4-stroke 8HP and 9.9HP engines. The kit provides all the necessary components for a comprehensive water pump service, ensuring your engine maintains optimal cooling performance.\u003c\/p\u003e\n\u003cp\u003eThis kit serves as a direct replacement for Yamaha OEM part numbers 68T-W0078-00-00, 68T-W0078-01-00, and 68T-W0078-02-00, and also interchanges with Sierra 18-3450 and Mallory 9-48613.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEngineered for direct OEM replacement fitment, simplifying installation.\u003c\/li\u003e\n  \u003cli\u003eFeatures a durable impeller made from high-quality rubber designed to withstand extended saltwater immersion.\u003c\/li\u003e\n  \u003cli\u003eIncludes a full set of gaskets, plates, and hardware for a complete rebuild.\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\u003e68T-W0078-00-00\u003c\/td\u003e\n        \u003ctd\u003eOriginal part number. Superseded by 68T-W0078-01-00.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e68T-W0078-01-00\u003c\/td\u003e\n        \u003ctd\u003eSupersedes 68T-W0078-00-00. Is superseded by 68T-W0078-02-00.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e68T-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003eCurrent part number. Supersedes 68T-W0078-01-00.\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\u003eAftermarket interchange.\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\u003eAftermarket interchange.\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\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\u003eF6\u003c\/td\u003e\n        \u003ctd\u003e6 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eUp to 06\/2008\u003c\/td\u003e\n        \u003ctd\u003e68T-W0078-00-00\u003c\/td\u003e\n        \u003ctd\u003eLater models use 68T-W0078-02-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF8\u003c\/td\u003e\n        \u003ctd\u003e8 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eUp to 06\/2008\u003c\/td\u003e\n        \u003ctd\u003e68T-W0078-00-00\u003c\/td\u003e\n        \u003ctd\u003eLater models use 68T-W0078-02-00\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 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eUp to 06\/2008\u003c\/td\u003e\n        \u003ctd\u003e68T-W0078-00-00\u003c\/td\u003e\n        \u003ctd\u003eLater models use 68T-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\u003eDirect OEM replacement\u003c\/dd\u003e\n  \u003cdt\u003eImpeller Material\u003c\/dt\u003e\n\u003cdd\u003eHigh quality rubber\u003c\/dd\u003e\n  \u003cdt\u003eTechnical Attributes\u003c\/dt\u003e\n\u003cdd\u003eImpellers manufactured to withstand extended salt water immersion\u003c\/dd\u003e\n\u003c\/dl\u003e\n\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 Water Seal Damper 2 (68T-44366-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Impeller (68T-44352-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Woodruff Key (664-44338-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x O-Ring (93210-44704-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Cartridge Outer Plate (68T-44323-00-00)\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e4 x Bolts (97095-08045-00)\u003c\/span\u003e\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 linkage before starting.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and carefully lower the gearcase (lower unit) from the engine's midsection.\u003c\/li\u003e\n  \u003cli\u003eLocate and unbolt the water pump housing cover to access the impeller.\u003c\/li\u003e\n  \u003cli\u003eRemove the old impeller, key, gaskets, and plates. Note the rotational direction of the old impeller vanes.\u003c\/li\u003e\n  \u003cli\u003eThoroughly clean all mating surfaces, removing any old gasket material or corrosion.\u003c\/li\u003e\n  \u003cli\u003eInstall the new components from the kit in the reverse order of disassembly.\u003c\/li\u003e\n  \u003cli\u003eLightly grease the new impeller and insert it into the housing while turning the driveshaft in its normal rotational direction.\u003c\/li\u003e\n  \u003cli\u003eReassemble the pump housing, reinstall the lower unit, and reconnect all linkages. Once reassembled, test run the engine in water and confirm a steady stream from the tell-tale outlet.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if this kit fits my Yamaha engine?\u003c\/summary\u003e\n  \u003cp\u003eThis kit is specifically designed for Yamaha F6, F8, and F9.9 4-stroke models manufactured up to June 2008. The best way to confirm fitment is to check your engine's original part number and compare it to the references in our Part Number Matrix.\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 signs of a worn or damaged impeller include the engine overheating at idle or low speeds, a weak or intermittent water stream from the \"tell-tale\" outlet, or an audible alarm from the engine's warning system.\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 crucial part of preventative maintenance, it is recommended to inspect and likely replace the impeller every one to two years, or every 100-200 hours of operation. Service intervals should be shorter for engines used frequently in saltwater or silty\/sandy conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the difference between the listed Yamaha part numbers?\u003c\/summary\u003e\n  \u003cp\u003eThe numbers 68T-W0078-00-00, 68T-W0078-01-00, and 68T-W0078-02-00 represent a supersession chain where Yamaha updated the part over time. Our aftermarket kit is designed to be a functional replacement for all of these OEM versions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this a genuine OEM part or an aftermarket replacement?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for a high-quality aftermarket replacement, not an OEM part. It is built to meet or exceed OEM-level specifications with comparable materials and performance. Our parts are manufactured in an ISO 9002 certified facility and are batch-inspected for quality and consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow fast is shipping and what does it cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free for all orders. Expedited shipping options and exact costs will be displayed at checkout if available for your location.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the warranty and return policy?\u003c\/summary\u003e\n  \u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal operating conditions. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard return window for items that are unused and in their original packaging. Please see our full policy page or contact us for instructions.\u003c\/p\u003e\n\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":50723981852987,"sku":"20KY001","price":41.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_6_8_99HP_68T-W0078-00_-_JLM_MARINE-8288847.jpg?v=1763039284","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-repair-kit-fits-yamaha-8hp-9-9hp-replaces-68t-w0078-00-00-18-3450","provider":"SeaSierra","version":"1.0","type":"link"}