{"product_id":"water-pump-impeller-repair-kit-fits-yamaha-9-9-15-hp-replaces-682-w0078-a1-00","title":"Water Pump Impeller Repair Kit – Fits Yamaha 9.9\/15 HP (Replaces 682-W0078-A1-00)","description":"\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis is a complete \u003cstrong\u003eWater Pump Impeller Repair Kit – Fits Yamaha 9.9\/15 HP\u003c\/strong\u003e, designed for Yamaha 9.9\/15 HP 2-Stroke (1984–1995) and F9.9\/T9.9 4-Stroke (1985–2005) outboard motors. The kit provides all the necessary components for a full service of the water pump assembly, ensuring reliable engine cooling.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct replacement for Yamaha part numbers 682-W0078-A1-00, 682-W0078-A2-00, and 682-W0078-A3-00, as well as Sierra 18-3148, 18-3411, and Mariner 46-84277M \/ 46-84277T.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eContains all components needed for a comprehensive water pump service.\u003c\/li\u003e\n\u003cli\u003eEngineered as a direct replacement for a hassle-free installation.\u003c\/li\u003e\n\u003cli\u003eFor proper installation, the use of silicone grease, glycerin, or dish soap is recommended (not included).\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\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\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Cross-Reference\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\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\u003e682-W0078-A1-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A2-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A3-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3148\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3411\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e46-84277M\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e46-84277T\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\u003eThis kit fits a range of Yamaha 2-stroke and 4-stroke models, as well as specific Mariner outboards.\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\u003ctd colspan=\"7\" style=\"background-color:#f3f4f6; font-weight:bold;\"\u003eYamaha 2-Stroke Applications\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e9.9D\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1984–1995\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e15D\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1984–1995\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\u003ctd colspan=\"7\" style=\"background-color:#f3f4f6; font-weight:bold;\"\u003eYamaha 4-Stroke Applications\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF9.9A, AE, AM (66N\u0026gt;66N8)\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1985–1996\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF9.9B, BE, BM (6AU1\u0026gt;6AU6, 6DR1\u0026gt;6DR3)\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1985–1996\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF9.9 (66R\u0026gt;66R8)\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1985–2004\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eFT9.9\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1985–1999\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1-00\u003c\/td\u003e\n        \u003ctd\u003eThrust model\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eT9.9 (69V2\u0026gt;69V8)\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1991–1999\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1-00\u003c\/td\u003e\n        \u003ctd\u003eHigh thrust model\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\u003ctd colspan=\"7\" style=\"background-color:#f3f4f6; font-weight:bold;\"\u003eMariner Applications\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e9.9C (S\/N prefix 682)\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eAll years\u003c\/td\u003e\n        \u003ctd\u003e46-84277M, 46-84277T\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\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\u003eDirect replacement\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eFor both gas\/oil mix (2-stroke) and gas (4-stroke) engines\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eMetal components with rubber impeller\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eSilver\/metallic with black impeller\u003c\/dd\u003e\n  \u003cdt\u003ePackage Dimensions\u003c\/dt\u003e\n\u003cdd\u003eApproximately 4.49 × 3.27 × 2.25 inches (114 × 83 × 57 mm)\u003c\/dd\u003e\n  \u003cdt\u003ePackage Weight\u003c\/dt\u003e\n\u003cdd\u003e7.2 ounces (204 g)\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eDirect fit for specified Yamaha outboards\u003c\/dd\u003e\n  \u003cdt\u003eInstallation Note\u003c\/dt\u003e\n\u003cdd\u003eSilicone grease, glycerin or dish soap recommended for installation (not included)\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\u003eImpeller\u003c\/li\u003e\n\u003cli\u003eGasket, Water Pump (682-44315-A0-00)\u003c\/li\u003e\n\u003cli\u003eInsert, Cartridge (682-44322-00-00)\u003c\/li\u003e\n\u003cli\u003eOuter Plate, Cartridge\u003c\/li\u003e\n\u003cli\u003eBolts\u003c\/li\u003e\n\u003cli\u003eKey, Woodruff\u003c\/li\u003e\n\u003cli\u003eO-Ring\u003c\/li\u003e\n\u003cli\u003eOther seals or components\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 battery and shift the outboard into neutral.\u003c\/li\u003e\n\u003cli\u003eRemove the bolts securing the lower unit (gearcase) and carefully separate it from the upper housing.\u003c\/li\u003e\n\u003cli\u003eLocate the water pump housing on top of the lower unit and remove its mounting bolts.\u003c\/li\u003e\n\u003cli\u003eSlide the housing up and off the driveshaft, exposing the impeller. Note the orientation of the old impeller vanes.\u003c\/li\u003e\n\u003cli\u003eRemove the old impeller, Woodruff key, gaskets, and wear plates. Clean all mating surfaces thoroughly.\u003c\/li\u003e\n\u003cli\u003eInstall the new Woodruff key, gasket, and wear plate from the kit.\u003c\/li\u003e\n\u003cli\u003eApply a lubricant like silicone grease, glycerin, or dish soap to the inside of the new pump housing and onto the new impeller.\u003c\/li\u003e\n\u003cli\u003eSlide the new impeller onto the driveshaft while turning the shaft clockwise to bed the vanes correctly.\u003c\/li\u003e\n\u003cli\u003eInstall the new housing, seals, and O-rings provided in the kit, and tighten bolts to the manufacturer's specified torque.\u003c\/li\u003e\n\u003cli\u003eReinstall the lower unit, ensuring the driveshaft, shift shaft, and water tube are correctly aligned. Securely tighten all bolts.\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\n  \u003csummary\u003eHow can I confirm this kit fits my Yamaha or Mariner engine?\u003c\/summary\u003e\n  \u003cp\u003eThe best way to confirm fitment is to check your engine's model and year against the compatibility table provided. Also, verify your existing OEM part number matches one of the numbers listed in our Part Number Matrix. If you're unsure, check your engine’s service manual or contact a mechanic.\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 include a weak or non-existent water stream from the \"tell-tale\" outlet, engine overheating alarms, and reduced engine performance. A visual inspection may show cracked, brittle, or missing vanes on the old impeller.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should I replace my outboard's water pump impeller?\u003c\/summary\u003e\n  \u003cp\u003eAs a general rule, it's recommended to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of use, whichever comes first. This interval can be shorter if you frequently operate in sandy, silty, or saltwater environments.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this kit include the water pump housing?\u003c\/summary\u003e\n  \u003cp\u003eThis kit contains the internal components for a water pump service, including the impeller, gaskets, plates, and seals. It does not typically include the main upper or lower housing unless specified. Please refer to the \"What’s in the Box\" section and product images.\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 is 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\u003eWhat is the shipping speed \u0026amp; cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free, and expedited options may be available at checkout depending on 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 use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. See our policy page or reach out for instructions.\u003c\/p\u003e\n\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\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":50723777282363,"sku":"YY-22KY001","price":22.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/YY-22KY001.png?v=1763031561","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-repair-kit-fits-yamaha-9-9-15-hp-replaces-682-w0078-a1-00","provider":"SeaSierra","version":"1.0","type":"link"}