{"product_id":"water-pump-repair-kit-fits-yamaha-150-300hp-outboard-motors-replaces-61a-w0078-a3-00-61a-w0078-a4-00","title":"Water Pump Repair Kit – Fits Yamaha 150-300HP Outboard Motors (Replaces 61A-W0078-A3-00, 61A-W0078-A4-00)","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\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis comprehensive \u003cstrong\u003eWater Pump Repair Kit – Fits Yamaha 150-300HP Outboard Motors\u003c\/strong\u003e provides all the essential components for servicing the cooling system on Yamaha outboard engines. It is designed for a broad range of Yamaha 2-stroke and 4-stroke V6 models from 150HP to 300HP manufactured between 1992 and 2023, including the popular F-series and VMAX families.\u003c\/p\u003e\n\u003cp\u003eThe kit serves as a direct interchange for Yamaha OEM part numbers 61A-W0078-A2-00, 61A-W0078-A3-00, and 61A-W0078-A4-00, as well as Sierra 18-3396-1 and Mallory 9-48618.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls in the lower unit\/gearcase to restore cooling performance.\u003c\/li\u003e\n\u003cli\u003eIncludes the impeller, housing, gaskets, O-rings, and all hardware for a complete rebuild.\u003c\/li\u003e\n\u003cli\u003eFeatures a durable housing constructed from high-quality Nylon PA66 plastic.\u003c\/li\u003e\n\u003c\/ul\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 Cross-Reference 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\u003e61A-W0078-A2-00\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A4-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A4-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A4-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eCurrent OEM Number\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3396-1\u003c\/td\u003e\n        \u003ctd\u003e\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\u003e9-48618\u003c\/td\u003e\n        \u003ctd\u003e\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\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eThis kit is designed for a wide range of Yamaha 2-stroke and 4-stroke V6 outboards from 150 to 300 horsepower.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine and 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\u003eF150, LF150\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAll Models\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF175LA, F175XA\u003c\/td\u003e\n        \u003ctd\u003e175\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2014–2016\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF200, LF200\u003c\/td\u003e\n        \u003ctd\u003e200\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002–2016\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003eMultiple variants including F200LB, F200TXR, F200XA, F200XB, F200XCA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF225, LF225\u003c\/td\u003e\n        \u003ctd\u003e225\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002–2016\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003eMultiple variants including F225TUR, F225TXR, F225XA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF250, LF250\u003c\/td\u003e\n        \u003ctd\u003e250\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2004–2005\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003eVariants include F250TUR, F250TXR\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eVF175LA\u003c\/td\u003e\n        \u003ctd\u003e175\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2015–2018\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003eVMAX SHO models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e150HP 2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1992–2006\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003eIncluding C150, P150, PX150, S150, SX150, V150, VX150, VZ150, Z150 variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e175HP 2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e175\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1997–2000\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003eIncluding 175TLRY, 175TXRY, S175TXR variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e200HP 2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e200\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1997–2005\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003eIncluding 200TLR, L200TXR, LX200TXR, S200TXR, SX200TXR, VX200TLR, VZ200TLR, Z200TLR, Z200TXR variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e225HP 2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e225\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1997–2005\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003eIncluding 225TLR, LX225TXR, SX225TUR, SX225TXR, VX225TLR variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e250HP 2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e250\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1992–2005\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003eIncluding LX250TUR, LX250TXR, S250, SX250, SX250TUR, SX250TXR, V250, VX250TLR, VZ250TLR variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e300HP 2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e300\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2003–2005\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003eZ300 models including Z300TUR, Z300TXR, LZ300TUR, LZ300TXR variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF150C\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2017–2023\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n        \u003ctd\u003eNewer F150 variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eWater Pump Repair Kit with Housing\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eLower Unit\/Gearcase\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003ePlastic (Nylon PA66)\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n  \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003eManufacturer standard warranty\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eIncludes hardware and all components for complete water pump rebuild\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Cartridge Insert (61A-44322-02-00)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e O-Ring (93210-86M38-00)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e O-Ring (93210-37M67-00)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Impeller (6E5-44352-01-00)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Cartridge Outer Plate (6G5-44323-01-00)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Water Pump Gasket (6E5-44315-A0-00)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e Dowel Pins (93606-12019-00)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e4 x\u003c\/span\u003e Bolts with Washer (90119-08M14-00)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Woodruff Key (90280-04M05-00)\u003c\/li\u003e\n\u003c\/ul\u003e\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 gearcase lubricant into a suitable container.\u003c\/li\u003e\n\u003cli\u003eRemove the bolts securing the lower unit (gearcase) and carefully lower it from the midsection.\u003c\/li\u003e\n\u003cli\u003eUnbolt and remove the old water pump housing from the driveshaft.\u003c\/li\u003e\n\u003cli\u003eThoroughly clean the mating surfaces of the driveshaft and lower unit.\u003c\/li\u003e\n\u003cli\u003eInstall the new gaskets, impeller, and housing components from the kit in the correct order.\u003c\/li\u003e\n\u003cli\u003eEnsure the Woodruff key is correctly seated on the driveshaft before sliding the new impeller on.\u003c\/li\u003e\n\u003cli\u003eSecure the new water pump housing, torquing the bolts to the manufacturer's specifications.\u003c\/li\u003e\n\u003cli\u003eReinstall the lower unit, ensuring the driveshaft, shift shaft, and water tube are properly aligned.\u003c\/li\u003e\n\u003cli\u003eRefill the gearcase with fresh marine gear lubricant.\u003c\/li\u003e\n\u003cli\u003eReconnect the battery and test the engine in the water to confirm strong water flow from the tell-tale outlet.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I know if this kit fits my engine?\u003c\/summary\u003e\n\u003cp\u003eThis kit is designed for a very wide range of Yamaha 150HP to 300HP V6 outboards from 1992-2023. The best way to confirm fitment is to check your engine's model and year against the detailed compatibility table provided on this page.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat are the signs of a failing water pump?\u003c\/summary\u003e\n\u003cp\u003eCommon signs include the engine overheating at idle or low speeds, a weak or intermittent water stream from the \"tell-tale\" outlet, or finding a dry, brittle, or cracked impeller during a routine inspection.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow often should I replace my water pump service kit?\u003c\/summary\u003e\n\u003cp\u003eAs a crucial part of preventative maintenance, it is recommended to replace the impeller and gaskets at least every 1-2 years or every 100-200 operating hours. Service intervals should be shorter if you frequently operate in saltwater, silt, or sandy conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the pump housing included with this kit?\u003c\/summary\u003e\n\u003cp\u003eYes, this is a complete repair kit. It includes the main plastic housing, cartridge insert, outer plate, impeller, gaskets, O-rings, and all necessary bolts and pins for a full replacement.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eMy part number is 61A-W0078-A3-00. Is this the right replacement?\u003c\/summary\u003e\n\u003cp\u003eYes. This kit is a direct aftermarket replacement for Yamaha parts 61A-W0078-A2-00, 61A-W0078-A3-00, and the latest iteration, 61A-W0078-A4-00.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs it difficult to install this kit myself?\u003c\/summary\u003e\n\u003cp\u003eThe installation requires removing the lower unit, which can be heavy and requires mechanical aptitude. While it can be a DIY job for experienced individuals with the right tools, we recommend professional installation to ensure safety and proper 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\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\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":50723778527547,"sku":"XR-61AW0078","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/XR-61AW0078.png?v=1763031599","url":"https:\/\/seasierra.com\/products\/water-pump-repair-kit-fits-yamaha-150-300hp-outboard-motors-replaces-61a-w0078-a3-00-61a-w0078-a4-00","provider":"SeaSierra","version":"1.0","type":"link"}