{"product_id":"water-pump-impeller-repair-kit-fits-yamaha-150-300-hp-replaces-61a-w0078-a2-00-61a-w0078-a3-00","title":"Water Pump Impeller Repair Kit – Fits Yamaha 150-300 HP (Replaces 61A-W0078-A2-00, 61A-W0078-A3-00)","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 complete \u003cstrong\u003eWater Pump Impeller Repair Kit\u003c\/strong\u003e is designed for Yamaha 2-stroke and 4-stroke outboard engines ranging from 150 to 300 HP. It offers broad compatibility with various V6 HPDI, V6 OX66, and V6 F-series outboard models, ensuring a precise fit for restoring your engine's cooling system performance.\u003c\/p\u003e\n\u003cp\u003eThis kit serves as a direct replacement for Yamaha part numbers 61A-W0078-A2-00, 61A-W0078-A3-00, and 61A-W0078-A4-00, as well as Sierra equivalents 18-3396-1 and 18-3395.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered for direct OEM-replacement installation.\u003c\/li\u003e\n\u003cli\u003eConstructed with durable neoprene, Nylon PA66, and 316 stainless steel for marine environments.\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary gaskets, O-rings, and hardware for a full service.\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\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\u003e61A-W0078-A2-00\u003c\/td\u003e\n        \u003ctd\u003e61A-W0078-A3-00\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      \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      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3395\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3396-1\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\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model in the table below.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFor Yamaha Owners:\u003c\/b\u003e This kit fits a wide range of V6 outboards. Please verify your specific model and part number before ordering, as year ranges can vary.\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\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\u003e150 HPDI\u003c\/td\u003e\n\u003ctd\u003e150\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e175 HPDI\u003c\/td\u003e\n\u003ctd\u003e175\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e200 HPDI\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e250 HPDI\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e150 OX66\u003c\/td\u003e\n\u003ctd\u003e150\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e200 OX66\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e225 OX66\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF150\u003c\/td\u003e\n\u003ctd\u003e150\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF175\u003c\/td\u003e\n\u003ctd\u003e175\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF200\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\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\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\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\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\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\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded by 61A-W0078-A3-00\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\u003eComplete Water Pump Impeller Repair Kit\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect OEM replacement\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eNylon PA66 plastic\u003c\/dd\u003e\n  \u003cdt\u003eImpeller Material\u003c\/dt\u003e\n\u003cdd\u003eNeoprene marine rubber\u003c\/dd\u003e\n  \u003cdt\u003eOther Materials\u003c\/dt\u003e\n\u003cdd\u003e316 stainless steel (cup and wear plate), non-asbestos gaskets, NBR O-rings\u003c\/dd\u003e\n  \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e1 Year\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 Woodruff Key (90280-04M05-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Outer Plate, Cartridge (6G5-44323-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x With Washer Bolt (90119-08M14-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Insert (Cartridge) (61A-44322-01-00)\u003c\/li\u003e\n  \u003cli\u003e1 x O-Ring (93210-86M38-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Water Pump Gasket (6E5-44315-A0-00)\u003c\/li\u003e\n  \u003cli\u003e1 x O-Ring (93210-37M67-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Impeller (6E5-44352-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Dowel Pin (93606-12019-00)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery and remove the engine cover.\u003c\/li\u003e\n  \u003cli\u003ePlace a drain pan under the lower unit and drain the gearcase oil.\u003c\/li\u003e\n  \u003cli\u003eRemove the bolts securing the lower unit (gearcase) to the upper casing and carefully lower it.\u003c\/li\u003e\n  \u003cli\u003eLocate the water pump housing on top of the gearcase. Remove the bolts securing the housing.\u003c\/li\u003e\n  \u003cli\u003eSlide the housing up and off the driveshaft, exposing the impeller and wear plate.\u003c\/li\u003e\n  \u003cli\u003eRemove the old impeller, key, gaskets, and seals. Clean all mating surfaces thoroughly.\u003c\/li\u003e\n  \u003cli\u003eInstall the new components from the kit in reverse order of removal, ensuring the impeller vanes are oriented correctly.\u003c\/li\u003e\n  \u003cli\u003eLightly grease the new impeller and insert it into the housing while turning the driveshaft clockwise.\u003c\/li\u003e\n  \u003cli\u003eRe-install the housing, lower unit, and refill with fresh gearcase oil.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery and test the engine's cooling system at the dock before heading out.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow can I tell if my water pump is failing?\u003c\/summary\u003e\u003cp\u003eCommon signs of a failing water pump include a weak or nonexistent water stream from the \"telltale\" outlet, engine overheating alarms, and a noticeable drop in water pressure on your gauges. A visual inspection may also reveal a melted housing or brittle, cracked impeller 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 impeller annually and replace the entire water pump kit every 2-3 years or 200-300 operating hours, whichever comes first. Usage in saltwater or sandy\/silty conditions may require more frequent service.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this kit compatible with both 2-stroke and 4-stroke engines?\u003c\/summary\u003e\u003cp\u003eYes, this kit is designed to fit a wide range of Yamaha V6 engines from 150-300 HP, covering both 2-stroke (HPDI, OX66) and 4-stroke (F-series) models. Always check the compatibility table to confirm your specific engine model.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat's the difference between OEM and aftermarket parts?\u003c\/summary\u003e\u003cp\u003eThis listing is for a high-quality aftermarket replacement, not an original equipment manufacturer (OEM) part. It has been engineered to meet or exceed OEM specifications using comparable materials and is manufactured in an ISO 9002 certified facility with rigorous quality control.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow fast do you ship?\u003c\/summary\u003e\u003cp\u003eWe ship worldwide, with most orders arriving in 5-15 days via standard shipping. Expedited shipping options are available at checkout for most regions. All orders are processed quickly to get you back on the water faster.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the warranty and return policy?\u003c\/summary\u003e\u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. We accept returns on unused items in their original condition within our standard return window.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement part, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is highly recommended for safety and optimal 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 rigorously tested for real-world reliability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — We offer free standard delivery to most regions, with typical transit times of 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723783508283,"sku":"22KY022","price":56.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_150-300_HP_61A-W0078-A2-00_-_JLM_MARINE-8285739.jpg?v=1763031680","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-repair-kit-fits-yamaha-150-300-hp-replaces-61a-w0078-a2-00-61a-w0078-a3-00","provider":"SeaSierra","version":"1.0","type":"link"}