{"product_id":"water-pump-impeller-kit-fits-yamaha-9-9-15-hp-replaces-682-w0078-a1-00-46-84277m","title":"Water Pump Impeller Kit – Fits Yamaha 9.9\/15 HP (Replaces 682-W0078-A1-00, 46-84277M)","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 \u003cstrong\u003eWater Pump Impeller Kit – Fits Yamaha 9.9\/15 HP (Replaces 682-W0078-A1-00)\u003c\/strong\u003e provides all essential components for servicing your outboard's water pump. It is designed for a precise fit on Yamaha 2-stroke 9.9\/15 HP (1984–1995) and 4-stroke 9.9 HP (1985–2004) engines, as well as select Mariner 9.9C and 15C outboards.\u003c\/p\u003e\n\u003cp\u003eThis kit serves as a direct replacement for Yamaha part numbers 682-W0078-00-00 through 682-W0078-A3-00, Sierra 18-3148, GLM 12278\/12281, and Mercury\/Mariner 46-84277M\/T and 46-84118M.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eEngineered as a direct OEM-equivalent replacement for straightforward installation.\u003c\/li\u003e\n    \u003cli\u003eFeatures a durable, marine-grade rubber impeller for reliable performance in salt and freshwater.\u003c\/li\u003e\n    \u003cli\u003eIncludes all necessary gaskets, bolts, 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 brands.\u003c\/p\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-W0078-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-01-00\u003c\/td\u003e\n      \u003c\/tr\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\u003eGLM\u003c\/td\u003e\n        \u003ctd\u003e12278\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eGLM\u003c\/td\u003e\n        \u003ctd\u003e12281\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003e46-84277M\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003e46-84277T\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003e46-84118M\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\u003cp\u003eFor Yamaha owners, this kit fits a range of 2-stroke and 4-stroke models from the mid-1980s through the mid-2000s. Please check your specific model code and year range.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Yamaha Engine 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\u003e9.9D\u003c\/td\u003e\n        \u003ctd\u003e9.9 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1984–1995\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n        \u003ctd\u003eE9.9D engines\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 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1984–1995\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n        \u003ctd\u003eE15D engines\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF9.9A\/AE\/AM\u003c\/td\u003e\n        \u003ctd\u003e9.9 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1985–1996\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n        \u003ctd\u003e66N\u0026gt;66N8 models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF9.9B\/BE\/BM\u003c\/td\u003e\n        \u003ctd\u003e9.9 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1985–1996\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n        \u003ctd\u003e6AU1\u0026gt;6AU6, 6DR1\u0026gt;6DR3 models\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\u003e1985–2004\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n        \u003ctd\u003e66R\u0026gt;66R8 models\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 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1985–1999\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n        \u003ctd\u003eHigh thrust models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF8AM\/B\/BE\/BM\u003c\/td\u003e\n        \u003ctd\u003e8 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1986–1995\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n        \u003ctd\u003e6G8 models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eT9.9\u003c\/td\u003e\n        \u003ctd\u003e9.9 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1991–1996\u003c\/td\u003e\n        \u003ctd\u003e682-W0078-A1\u003c\/td\u003e\n        \u003ctd\u003e69V2\u0026gt;69V8 models\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eFor Mariner owners, this kit is compatible with 9.9C and 15C 2-stroke outboards that use the specified codes.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Mariner Engine 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\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e9.9C\u003c\/td\u003e\n        \u003ctd\u003e9.9 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAll Years\u003c\/td\u003e\n        \u003ctd\u003e46-84277M\/46-84118M\u003c\/td\u003e\n        \u003ctd\u003eCode 682\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e15C\u003c\/td\u003e\n        \u003ctd\u003e15 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAll Years\u003c\/td\u003e\n        \u003ctd\u003e46-84277M\/46-84118M\u003c\/td\u003e\n        \u003ctd\u003eCode 684\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 Kit\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect OEM replacement\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eHigh-quality rubber (marine grade)\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eDirect drive via woodruff key\u003c\/dd\u003e\n  \u003cdt\u003eOperating Temperature\u003c\/dt\u003e\n\u003cdd\u003eSalt and freshwater compatible\u003c\/dd\u003e\n  \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003eManufacturer warranty against defects\u003c\/dd\u003e\n  \u003cdt\u003eProduction Standards\u003c\/dt\u003e\n\u003cdd\u003eISO9002 certified factory\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 Impeller (682-44352-03-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Cartridge Insert (682-44322-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Outer Plate, Cartridge (682-44323-00-00)\u003c\/li\u003e\n  \u003cli\u003e2 x Water Pump Gaskets (682-44315-A0-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Water Seal Damper (682-44365-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Woodruff Key (90280-03024-00)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e4 x Bolts\u003c\/span\u003e (97080-06045-00)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the spark plug leads and shift the outboard into neutral.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit (gearcase) by unfastening the mounting bolts located above the anti-cavitation plate.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and carefully lift the water pump housing off the driveshaft. Note the orientation of the old impeller vanes.\u003c\/li\u003e\n  \u003cli\u003eRemove the old impeller, woodruff key, wear plate, and gaskets.\u003c\/li\u003e\n  \u003cli\u003eThoroughly clean the mating surfaces of the housing and plate, removing any old gasket material or sealant.\u003c\/li\u003e\n  \u003cli\u003eInstall the new lower gasket, wear plate, and woodruff key.\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 cartridge insert into the housing and place the upper gasket on the wear plate.\u003c\/li\u003e\n  \u003cli\u003eApply a thin layer of marine grease or soap-and-water solution to the inside of the pump housing.\u003c\/li\u003e\n  \u003cli\u003eReinstall the housing and tighten the bolts in a crisscross pattern to the manufacturer's recommended torque.\u003c\/li\u003e\n  \u003cli\u003eReattach the lower unit to the outboard, ensuring the driveshaft and water tube align correctly.\u003c\/li\u003e\n  \u003cli\u003eReconnect spark plug leads and test the engine using a flush-pro or in the water, confirming a steady stream from the tell-tale port.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I confirm this kit fits my specific engine model?\u003c\/summary\u003e\u003cp\u003eVerify your engine's model name, serial number, and year. Cross-reference this information with the compatibility tables provided on this page. For Yamaha, model codes like 682, 66N, or 6G8 are critical identifiers. If you're unsure, check your owner's manual or contact us with your engine details before ordering.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the common signs of a failing water pump impeller?\u003c\/summary\u003e\u003cp\u003eA weak or intermittent water stream from the \"tell-tale\" outlet is the most common sign. Other indicators include the engine overheating alarm sounding, steam from the exhaust, or reduced engine performance. It's crucial to shut down the engine immediately if overheating is suspected to prevent serious damage.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should I replace my outboard's impeller?\u003c\/summary\u003e\u003cp\u003eAs a general maintenance rule, it is recommended to replace the water pump impeller every 1-2 years or every 100-200 hours of use, whichever comes first. For engines operated in saltwater or sandy\/silty conditions, annual replacement is strongly advised.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this kit include the water pump housing?\u003c\/summary\u003e\u003cp\u003eNo, this is an impeller repair kit that includes the impeller, gaskets, plates, and related hardware. The metal housing is not included. This kit is intended for situations where the housing is still in good condition and does not need replacement.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the difference between the Yamaha A1, A2, and A3 part numbers?\u003c\/summary\u003e\u003cp\u003eThe -A1, -A2, and -A3 suffixes typically denote minor revisions or supersessions by the manufacturer over time. These kits are functionally identical and fully interchangeable for all listed compatible models. Our kit is cross-compatible with all of them.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this an OEM part or an aftermarket one?\u003c\/summary\u003e\u003cp\u003eThis listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. The kit is manufactured in an ISO 9002 certified facility and is batch-inspected for quality and consistency.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the shipping speed and cost?\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free for most orders, with expedited options available at checkout where applicable.\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 use. If you encounter any issues, please 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\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 installation. If anything differs—even if your model appears compatible—do not purchase or install.\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 highly recommended for safety, proper function, and to prevent engine damage.\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 and longevity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — With efficient logistics, we offer free standard delivery to most regions, typically arriving in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — By working directly with factories, 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":50723776954683,"sku":"22KY001","price":38.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_99_-_15_HP_682-W0078_-00_-A1_-A2_-A3_-_84118M_-_JLM_MARINE-8288744.jpg?v=1763031545","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-kit-fits-yamaha-9-9-15-hp-replaces-682-w0078-a1-00-46-84277m","provider":"SeaSierra","version":"1.0","type":"link"}