{"product_id":"water-pump-impeller-fits-mercury-mariner-honda-40-300hp-replaces-47-43026t2","title":"Water Pump Impeller – Fits Mercury\/Mariner\/Honda 40-300HP (Replaces 47-43026T2)","description":"\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis high-quality \u003cstrong\u003eWater Pump Impeller – Fits Mercury\/Mariner\/Honda 40-300HP (Replaces 47-43026T2)\u003c\/strong\u003e is a critical service part for maintaining your engine's cooling system. It is engineered for a wide range of Mercury\/Mariner outboards from 40 to 300HP, MerCruiser Alpha I (Gen 2) and Vazer sterndrives, and select Honda outboard models.\u003c\/p\u003e\n\u003cp\u003eThis component serves as a direct replacement for multiple OEM and aftermarket part numbers, including Mercury 47-43026T2, Sierra 18-3056, Mallory 9-45037, and EMP 47-01814.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for direct, hassle-free installation.\u003c\/li\u003e\n\u003cli\u003eConstructed from a durable rubber compound with a metal hub for longevity.\u003c\/li\u003e\n\u003cli\u003eResistant to engine heat and abrasive wear in marine environments.\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\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e47-43026T2\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3056\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMallory\u003c\/td\u003e\n        \u003ctd\u003e9-45037\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eEMP\u003c\/td\u003e\n        \u003ctd\u003e47-01814\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\u003e\u003cb\u003eFor Mercury\/Mariner owners:\u003c\/b\u003e This impeller fits a variety of 3 and 4-cylinder outboards, including Bigfoot models, as well as Alpha One Generation 2 sterndrives.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFor Honda owners:\u003c\/b\u003e This part is confirmed compatible with specific Honda outboards. Please check your service manual for OEM part number interchange with Mercury 47-43026T2.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"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\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eOutboard\u003c\/td\u003e\n        \u003ctd\u003e30\/40\/45\/50\/60\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eBigfoot models\u003c\/td\u003e\n        \u003ctd\u003e47-43026T2\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003eAlpha I-Gen 2\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003es\/n D494569 \u0026amp; above\u003c\/td\u003e\n        \u003ctd\u003e47-43026T2\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\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eRubber with metal hub\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eOD: 89mm, ID: 22.4mm, Width: 32.5mm\u003c\/dd\u003e\n  \u003cdt\u003eNumber of Blades\u003c\/dt\u003e\n\u003cdd\u003e6\u003c\/dd\u003e\n  \u003cdt\u003eKey Required\u003c\/dt\u003e\n\u003cdd\u003eYes (28-32833)\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eResistant to heat and wear\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\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Water Pump Impeller (47-43026T2)\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 negative battery cable for safety.\u003c\/li\u003e\n\u003cli\u003eRemove the lower unit (gearcase) from the outboard or sterndrive.\u003c\/li\u003e\n\u003cli\u003eLocate and unbolt the water pump housing cover.\u003c\/li\u003e\n\u003cli\u003eCarefully slide the old impeller off the driveshaft, noting its orientation. Remove the drive key.\u003c\/li\u003e\n\u003cli\u003eClean any old gasket material or debris from the housing and wear plate surfaces.\u003c\/li\u003e\n\u003cli\u003ePlace the new gasket and wear plate (if included in your kit) into position.\u003c\/li\u003e\n\u003cli\u003eInsert the new key into the driveshaft keyway.\u003c\/li\u003e\n\u003cli\u003eLubricate the inside of the pump housing and the new impeller with a marine-safe lubricant.\u003c\/li\u003e\n\u003cli\u003eSlide the new impeller onto the shaft while turning the shaft clockwise to bed the blades correctly.\u003c\/li\u003e\n\u003cli\u003eRe-install the water pump housing and tighten bolts to the manufacturer's specified torque.\u003c\/li\u003e\n\u003cli\u003eRe-attach the lower unit, ensuring the driveshaft and water tube are correctly aligned.\u003c\/li\u003e\n\u003cli\u003eAfter reassembly, test the engine in the water to verify proper cooling system operation.\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 do I know if this impeller is the right one for my engine?\u003c\/summary\u003e\n\u003cp\u003eThe best method is to match your existing part number to one in our Part Number Matrix. If you don't know the part number, check the Engine Compatibility table. Always visually compare your old part to our photos before ordering.\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 \"telltale\" water stream, or a high temperature alarm. Brittle, cracked, or missing impeller blades upon inspection are definitive signs of failure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow often should I change my impeller?\u003c\/summary\u003e\n\u003cp\u003eAs a general maintenance guideline, impellers should be inspected annually and replaced every 1-2 years, regardless of engine hours. In sandy or silty water conditions, more frequent replacement is recommended.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs a keyway required for this impeller?\u003c\/summary\u003e\n\u003cp\u003eYes, this impeller requires a drive key (part number 28-32833) to lock it to the driveshaft. Ensure your old key is in good condition or purchase a new one for installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n\u003cp\u003eThis listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow fast is shipping and what does it cost?\u003c\/summary\u003e\n\u003cp\u003eWe ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available for 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 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\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 quality control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723973660987,"sku":"17IH009","price":15.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_for_Mercury-Mariner-Honda_WATER_PUMP_KIT_40-300_HP_47-43026T2_-_JLM_MARINE-8289750.jpg?v=1763038913","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-fits-mercury-mariner-honda-40-300hp-replaces-47-43026t2","provider":"SeaSierra","version":"1.0","type":"link"}