{"product_id":"water-pump-impeller-kit-fits-yamaha-15-20-hp-4-stroke-replaces-6ah-w0078-00-00","title":"Water Pump Impeller Kit – Fits Yamaha 15\/20 HP 4-Stroke (Replaces 6AH-W0078-00-00)","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\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  table.ss-table th {\n    white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc;\n  }\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\u003c\/strong\u003e provides all necessary components for a complete service on select Yamaha 15 HP and 20 HP 4-stroke outboard motors manufactured from 2006 onwards. It is engineered to restore the cooling system's performance and reliability, preventing engine damage from overheating.\u003c\/p\u003e\n\u003cp\u003eThis kit is a direct aftermarket replacement for Yamaha part numbers 6AH-W0078-00-00, 6AH-W0078-01-00, 6AH-W0078-02-00, 68T-W0078-00-00, and Sierra 18-3479.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls as a direct OEM-equivalent replacement.\u003c\/li\u003e\n\u003cli\u003eManufactured in an ISO9002 certified facility to meet or exceed OEM specifications.\u003c\/li\u003e\n\u003cli\u003eIncludes all essential gaskets, seals, and hardware for a complete overhaul.\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 suppliers.\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\u003e6AH-W0078-00-00\u003c\/td\u003e\n        \u003ctd\u003ePrimary Part Number\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-01-00\u003c\/td\u003e\n        \u003ctd\u003eSuperseded Part\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003eSuperseded Part\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e68T-W0078-00-00\u003c\/td\u003e\n        \u003ctd\u003eEquivalent Kit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3479\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 and year in the table below to ensure correct fitment.\u003c\/p\u003e\n\u003cp\u003eThis kit is designed for Yamaha 4-stroke models listed below. While it may fit certain Parsun models, we recommend verifying the specific part number with your engine's service manual before ordering.\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\u003eF15C\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2006 and newer\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF15 (6AG1 TO 6AG9)\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2007–2014\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF15 (6AGA TO 6AGB)\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2015–2016\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF20A\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2006 and newer\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF20 (6AH1 TO 6AH9)\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2007–2014\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF20 (6AHA TO 6AHB)\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2015–2016\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF9.9 (6CA1-6AC9)\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2009–2016\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF13.5 (6AF1 TO 6AF3)\u003c\/td\u003e\n        \u003ctd\u003e13.5\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2007–2009\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-00-00\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 Impeller Service 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\u003eCast Iron\u003c\/dd\u003e\n  \u003cdt\u003eManufacturing\u003c\/dt\u003e\n\u003cdd\u003eManufactured to OEM specifications in an ISO9002 certified factory.\u003c\/dd\u003e\n  \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e1 year against manufacturing defects (JLM Marine)\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 Water Pump Housing (6AH-44311-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Cartridge Insert (63V-44322-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Water Seal Damper (6L2-44367-01-00)\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e1 x Water Pump Impeller (63V-44352-01-00)\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e1 x Woodruff Key (664-44338-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x O-Ring (93210-49046-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Cartridge Outer Plate (6AH-44323-00-00)\u003c\/li\u003e\n  \u003cli\u003e2 x Plate (63V-44328-01-00)\u003c\/li\u003e\n  \u003cli\u003e2 x Dowel Pin (93604-10M03-00)\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e4 x Bolt (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 negative battery cable and remove the engine cover.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit (gearcase) from the outboard motor.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and remove the existing water pump housing to access the impeller.\u003c\/li\u003e\n  \u003cli\u003eClean all mating surfaces, removing any old gasket material or corrosion.\u003c\/li\u003e\n  \u003cli\u003eInstall the new components from the kit, ensuring the impeller vanes are oriented correctly (typically spinning clockwise during installation).\u003c\/li\u003e\n  \u003cli\u003eReassemble the pump housing, torque bolts to manufacturer specifications, and reinstall the lower unit.\u003c\/li\u003e\n  \u003cli\u003eBefore starting the engine, use a flush attachment or submerge the lower unit in water to ensure the pump is primed and check for proper water flow 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 confirm this kit fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eCheck your engine's model, rated HP, and year against our compatibility chart. It is critical to also verify that the OEM part number for your motor (e.g., 6AH-W0078-00-00) is listed in the 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 symptoms include the engine overheating, a persistent alarm sounding, or a weak, inconsistent, or non-existent water stream from the \"tell-tale\" diagnostic outlet.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should an impeller be replaced?\u003c\/summary\u003e\n  \u003cp\u003eFor preventative maintenance, most manufacturers recommend replacing the impeller and associated wear components every 1 to 2 years or every 100-200 operating hours, whichever comes first. This interval may be shorter in saltwater or silty conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this service kit include the housing?\u003c\/summary\u003e\n  \u003cp\u003eYes, this is a complete water pump impeller service kit that includes the main housing, impeller, wear plates, gaskets, o-rings, and installation hardware as detailed in the \"What’s in the Box\" section.\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). It's built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch-inspections for quality and 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 is 5–15 days. Standard shipping is free for most orders, and expedited options are available at checkout where applicable.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n  \u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter an issue, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out 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 and specifications against 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 part, not an original equipment manufacturer (OEM) component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is 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 conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — We offer free standard delivery to most regions, with an average transit time of 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Our parts are priced fairly by eliminating middlemen, 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":50718267801915,"sku":"YY-17KY006","price":44.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/YY-17KY006.png?v=1762958604","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-kit-fits-yamaha-15-20-hp-4-stroke-replaces-6ah-w0078-00-00","provider":"SeaSierra","version":"1.0","type":"link"}