{"product_id":"water-pump-impeller-kit-fits-mercury-mariner-30-70-hp-replaces-47-89983t-47-89983","title":"Water Pump Impeller Kit – Fits Mercury\/Mariner 30-70 HP (Replaces 47-89983T, 47-89983)","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 \u003cstrong\u003eWater Pump Impeller Kit\u003c\/strong\u003e is an essential service part designed for a wide range of Mercury and Mariner outboards from the 1970s through the 1990s, covering 30 HP to 70 HP models with both 2-stroke and 4-stroke engines. It provides a reliable, direct replacement to restore your engine's cooling system performance.\u003c\/p\u003e\n  \u003cp\u003eEngineered to serve as a direct replacement, this kit interchanges with Mercury part numbers 47-89983T, 47-89983, 47-65959, and 47-20268, as well as aftermarket equivalents like Sierra 18-3007, Mallory 9-45300, and CEF 500312.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eInstalls as a direct OEM-spec replacement.\u003c\/li\u003e\n    \u003cli\u003eFeatures a durable 6-blade neoprene impeller with a corrosion-resistant metal alloy hub.\u003c\/li\u003e\n    \u003cli\u003eComplete kit includes the impeller, key, and necessary gaskets for a full service.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\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  \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\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e47-89983\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e47-65959\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e47-20268\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eSierra\u003c\/td\u003e\n          \u003ctd\u003e18-3007\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMallory\u003c\/td\u003e\n          \u003ctd\u003e9-45300\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eCEF\u003c\/td\u003e\n          \u003ctd\u003e500312\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\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\u003eFitment for this impeller kit covers a broad range of Mercury and Mariner outboards. Please verify your engine's serial number against the specified ranges to ensure an exact match.\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\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e30 HP\u003c\/td\u003e\n          \u003ctd\u003e30\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1984–1989\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: 1271884-1448139\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e30 Jet\u003c\/td\u003e\n          \u003ctd\u003e30\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1994–1997\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: C159200-G589999\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e35 HP (2-Cyl.)\u003c\/td\u003e\n          \u003ctd\u003e35\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1984–1986\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: 1217222-1448139 \u0026amp; 1571114-UP\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e35 HP (2-Cyl.)\u003c\/td\u003e\n          \u003ctd\u003e35\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1984–1989\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: 6445653 \u0026amp; Up, BEL 9384476 \u0026amp; Up, CAN 7209608 \u0026amp; Up\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e40 HP (2-Cyl.)\u003c\/td\u003e\n          \u003ctd\u003e40\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1970–1983\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: 1224481-1476509 \u0026amp; 2874704-6445653\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e40 HP (4-Cyl.)\u003c\/td\u003e\n          \u003ctd\u003e40\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1989 \u0026amp; Up\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: C159200-UP\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e45 HP (4-Cyl.)\u003c\/td\u003e\n          \u003ctd\u003e45\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1986\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: 1279685-1476509 \u0026amp; 5531630-UP\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e50 HP (4-Cyl.)\u003c\/td\u003e\n          \u003ctd\u003e50\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1976–1985\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: 1421113-4962055\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e50 HP (4-Cyl.)\u003c\/td\u003e\n          \u003ctd\u003e50\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1985 \u0026amp; Up\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: 4962056-UP\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e50 HP (3-Cyl.)\u003c\/td\u003e\n          \u003ctd\u003e50\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1986–1987\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: 6428681-D000749\u003c\/td\u003e\n        \u003c\/tr\u003e\n         \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e60 HP (3-Cyl.)\u003c\/td\u003e\n          \u003ctd\u003e60\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1984–1987\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: 6428681-D000749\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e65 HP (3-Cyl.)\u003c\/td\u003e\n          \u003ctd\u003e65\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1972–1976\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: 3293184-4571651\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e70 HP (3-Cyl.)\u003c\/td\u003e\n          \u003ctd\u003e70\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1977–1983\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: 4571652-B11005\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e350 (35 HP)\u003c\/td\u003e\n          \u003ctd\u003e35\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1966–1969\u003c\/td\u003e\n          \u003ctd\u003e47-89983T\u003c\/td\u003e\n          \u003ctd\u003eSerial Range: 1960827-2453068\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\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 Kit\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect OEM replacement\u003c\/dd\u003e\n    \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eHeight: 19.1 mm (0.75 inches); Overall Diameter: 51.8 mm (2.04 inches); Hub Shaft Diameter: 19.2 mm (0.76 inches)\u003c\/dd\u003e\n    \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e30 g (1.06 oz)\u003c\/dd\u003e\n    \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003e6 blades; neoprene rubber with metal alloy hub insert\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Water Pump Impeller (47-89983T)\u003c\/li\u003e\n    \u003cli\u003e1 x Impeller Key (28-56662)\u003c\/li\u003e\n    \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e2 x Gasket (12-19183-3)\u003c\/span\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\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\u003ePlace a drain pan under the lower unit and remove the gear oil drain\/fill screws to empty the oil.\u003c\/li\u003e\n    \u003cli\u003eRemove the bolts securing the lower unit (gearcase) to the upper housing. There may be a hidden bolt under the trim tab anode.\u003c\/li\u003e\n    \u003cli\u003eCarefully lower and separate the lower unit from the engine.\u003c\/li\u003e\n    \u003cli\u003eUnbolt and remove the old water pump housing to access the impeller.\u003c\/li\u003e\n    \u003cli\u003eRemove the old impeller, key, and gaskets. Thoroughly clean all mating surfaces.\u003c\/li\u003e\n    \u003cli\u003eInstall the new lower gasket, impeller key, and then the new impeller. Rotate the driveshaft clockwise while pushing down to seat the blades correctly.\u003c\/li\u003e\n    \u003cli\u003eInstall the new upper gasket and re-install the water pump housing, tightening bolts to the manufacturer's torque specification.\u003c\/li\u003e\n    \u003cli\u003eRe-install the lower unit, ensuring the driveshaft, shift shaft, and water tube align correctly.\u003c\/li\u003e\n    \u003cli\u003eRefill the lower unit with fresh gear oil from the bottom up until it flows from the top vent hole. Re-install both screws.\u003c\/li\u003e\n    \u003cli\u003eReconnect the battery, start the engine using a water source (flushing muffs), and verify a strong water stream from the tell-tale outlet.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I find my engine's serial number to confirm fitment?\u003c\/summary\u003e\n    \u003cp\u003eYour engine's serial number is typically located on a tag on the transom bracket or on the engine block itself. Compare this number to the ranges listed in the compatibility table to ensure this kit is the correct fit for your outboard.\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 at idle or low speeds, a weak or non-existent water stream from the \"tell-tale\" cooling outlet, and in some cases, a high temperature alarm if your engine is equipped with one.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I replace my impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs a preventative maintenance item, it is recommended to replace the impeller every 1 to 2 years, or every 100-200 hours of operation. Frequency should be increased if you operate in sandy, silty, or saltwater conditions.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy does the new impeller seem difficult to install in the housing?\u003c\/summary\u003e\n    \u003cp\u003eNew impellers are designed for a tight fit. To install, place the new key on the driveshaft, align the impeller, and rotate the driveshaft clockwise while gently pushing the impeller down into the housing. This will correctly bend the vanes in the direction of rotation.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this impeller suitable for both saltwater and freshwater use?\u003c\/summary\u003e\n    \u003cp\u003eYes. The impeller is made from durable neoprene rubber with a corrosion-resistant metal alloy hub, making it suitable for operation in both saltwater and freshwater environments.\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). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for 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 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n    \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\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\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003ePro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003eFast Global Fulfillment — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003eManufacturer-Direct Value — 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":50723964911931,"sku":"24KM111-QM","price":12.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/24KM111-QM.png?v=1763038563","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-kit-fits-mercury-mariner-30-70-hp-replaces-47-89983t-47-89983","provider":"SeaSierra","version":"1.0","type":"link"}