{"product_id":"water-pump-impeller-fits-mercury-marine-4-9-8-hp-2-stroke-outboards-replaces-47-89981","title":"Water Pump Impeller – Fits Mercury Marine 4-9.8 HP 2-Stroke Outboards (Replaces 47-89981)","description":"\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\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis high-quality \u003cstrong\u003eWater Pump Impeller – Fits Mercury Marine 4-9.8 HP 2-Stroke Outboards (Replaces 47-89981)\u003c\/strong\u003e is an aftermarket component engineered for a direct fit on various Mercury Marine 2-Stroke outboard motors, including 4, 4.5, 6, 7.5, and 9.8 HP models. It is designed to restore cooling system performance and prevent engine overheating.\u003c\/p\u003e\n  \u003cp\u003eThis part serves as a direct cross-reference for several part numbers, including Sierra 18-3039, Mercury 47-89981, Mercury 47-65957, Mercury 47-39074, CEF 500314, and GLM 12270.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eInstalls directly into the water pump housing.\u003c\/li\u003e\n    \u003cli\u003eConstructed from durable neoprene with a brass hub for reliable service.\u003c\/li\u003e\n    \u003cli\u003eFeatures 6 blades for efficient water circulation.\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        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eSierra\u003c\/td\u003e\n          \u003ctd\u003e18-3039\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e47-89981\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e47-65957\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e47-39074\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eCEF\u003c\/td\u003e\n          \u003ctd\u003e500314\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eGLM\u003c\/td\u003e\n          \u003ctd\u003e12270\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 Mercury\/Mariner engines, this impeller fits a specific range of 1- and 2-cylinder models. Please check your engine's serial number and original part number to ensure a correct match.\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\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e1-Cylinder\u003c\/td\u003e\n          \u003ctd\u003e4\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e47-89981\u003c\/td\u003e\n          \u003ctd\u003eSerial number 2278851 and up, USA models\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e1-Cylinder\u003c\/td\u003e\n          \u003ctd\u003e4.5\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e47-89981\u003c\/td\u003e\n          \u003ctd\u003eInside diameter 0.456 inch\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e40 (4 HP)\u003c\/td\u003e\n          \u003ctd\u003e4\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e47-89981\u003c\/td\u003e\n          \u003ctd\u003eSerial number 2278851 and up, 1-Cylinder\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e45, 4.5\u003c\/td\u003e\n          \u003ctd\u003e4.5\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e47-89981\u003c\/td\u003e\n          \u003ctd\u003e1-Cylinder\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e60 (6 HP)\u003c\/td\u003e\n          \u003ctd\u003e6\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e47-89981\u003c\/td\u003e\n          \u003ctd\u003eSerial number 1916139 thru 2529894\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e7.5 HP\u003c\/td\u003e\n          \u003ctd\u003e7.5\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e47-89981\u003c\/td\u003e\n          \u003ctd\u003eInside diameter 0.456 inch\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e75 (7.5 HP)\u003c\/td\u003e\n          \u003ctd\u003e7.5\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e47-89981\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e9.8 HP\u003c\/td\u003e\n          \u003ctd\u003e9.8\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e47-89981\u003c\/td\u003e\n          \u003ctd\u003eInside diameter 0.456 inch\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e110 (10 HP)\u003c\/td\u003e\n          \u003ctd\u003e10\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e47-89981\u003c\/td\u003e\n          \u003ctd\u003eSerial number 1865779 and up\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\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement in water pump housing\u003c\/dd\u003e\n    \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eNeoprene with Brass Hub\u003c\/dd\u003e\n    \u003cdt\u003eNumber of Blades\u003c\/dt\u003e\n\u003cdd\u003e6\u003c\/dd\u003e\n    \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eHeight: 14.40 mm, Overall Diameter: 32.00 mm, Shaft Diameter: 11.60 mm\u003c\/dd\u003e\n    \u003cdt\u003eInternal Diameter\u003c\/dt\u003e\n\u003cdd\u003e0.456 inch (11.58 mm)\u003c\/dd\u003e\n    \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e11 g (0.458 oz)\u003c\/dd\u003e\n    \u003cdt\u003eEngine Type\u003c\/dt\u003e\n\u003cdd\u003e2-Stroke\u003c\/dd\u003e\n    \u003cdt\u003eCompatibility\u003c\/dt\u003e\n\u003cdd\u003eNot compatible with 5 HP Mercury Mariner engines\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 Impeller (47-89981)\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 the battery for safety.\u003c\/li\u003e\n    \u003cli\u003eDrain the gearcase oil from the lower unit.\u003c\/li\u003e\n    \u003cli\u003eUnbolt and carefully detach the lower unit from the engine's midsection.\u003c\/li\u003e\n    \u003cli\u003eLocate and unbolt the water pump housing cover.\u003c\/li\u003e\n    \u003cli\u003eRemove the old impeller, paying attention to its rotational direction. Clean any debris from the housing.\u003c\/li\u003e\n    \u003cli\u003eLightly lubricate the new impeller and the inside of the housing with a marine-safe lubricant.\u003c\/li\u003e\n    \u003cli\u003eInstall the new impeller by pushing down while turning the driveshaft in the direction of engine rotation to bend the blades correctly.\u003c\/li\u003e\n    \u003cli\u003eReinstall the water pump housing and torque its bolts to the manufacturer's specification.\u003c\/li\u003e\n    \u003cli\u003eReattach the lower unit, ensuring the driveshaft, shift shaft, and water tube are aligned.\u003c\/li\u003e\n    \u003cli\u003eRefill the lower unit with fresh gear oil before starting the engine.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill this impeller fit my 5 HP Mercury engine?\u003c\/summary\u003e\n    \u003cp\u003eNo, this impeller has an internal diameter of 0.456\" and is specifically noted as not compatible with 5 HP Mercury Mariner engines. Always verify your part number and engine specifications before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow can I confirm this part fits my motor?\u003c\/summary\u003e\n    \u003cp\u003eThe best way is to compare your existing impeller's part number and dimensions to those listed here. Check the compatibility table for your engine model, HP, and serial number range. When in doubt, consult your engine's service manual.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the signs of a failing impeller?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs of a worn or damaged impeller include the engine overheating at idle or low speeds, a weak or non-existent water stream from the \"tell-tale\" cooling outlet, and finding brittle, cracked, or broken blades during inspection.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I replace my impeller?\u003c\/summary\u003e\n    \u003cp\u003eFor preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1 to 2 years (or 100-200 hours of use), especially if operating in saltwater or sandy\/silty conditions.\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. Manufactured in an ISO 9002 facility, it is batch-inspected for consistency and quality.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the shipping speed \u0026amp; cost?\u003c\/summary\u003e\n    \u003cp\u003eWe ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free to most regions; expedited options will appear at checkout where available.\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 part 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\n  \u003c\/details\u003e\n\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\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":50717909287227,"sku":"XV-1ZVG-PA5L","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/XV-1ZVG-PA5L.png?v=1762938184","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-fits-mercury-marine-4-9-8-hp-2-stroke-outboards-replaces-47-89981","provider":"SeaSierra","version":"1.0","type":"link"}