{"product_id":"water-pump-impeller-kit-fits-mercury-mariner-75-115hp-4-stroke-replaces-817275a5-46-817275q05","title":"Water Pump Impeller Kit – Fits Mercury\/Mariner 75-115HP 4-Stroke (Replaces 817275A5, 46-817275Q05)","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\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eWater Pump Impeller Kit\u003c\/strong\u003e provides a comprehensive solution for servicing the cooling system on Mercury\/Mariner 4-stroke outboards from 75HP to 115HP (including 1596cc, 1731cc, and 2.1L models) manufactured from 2004 to the present. The kit is engineered as a direct-fit replacement to restore cooling performance and prevent engine overheating.\u003c\/p\u003e\n\u003cp\u003eIt interchanges with Mercury part numbers 46-817275A5, 46-817275Q05, 817275K05, 817275A10, and Sierra aftermarket parts 18-3147 and 18-3406.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls as a direct OEM-equivalent replacement.\u003c\/li\u003e\n\u003cli\u003eIncludes all essential components: impeller, housing, face plate, gaskets, and hardware.\u003c\/li\u003e\n\u003cli\u003eConstructed from durable metal alloy and neoprene rubber for longevity 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\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\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e46-817275A5\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e46-817275Q05\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e817275K05\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e817275A10\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3147\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3406\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 specific Mercury and Mariner FourStroke engines. Please note the distinction between pre-2015 and 2015+ models, which use different OEM part-number series but are covered by this single kit.\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\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\u003eFourStroke\u003c\/td\u003e\n        \u003ctd\u003e75\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2004–2015\u003c\/td\u003e\n        \u003ctd\u003e817275A5\u003c\/td\u003e\n        \u003ctd\u003e1596cc\/1731cc engines\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eFourStroke\u003c\/td\u003e\n        \u003ctd\u003e80\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2004–2015\u003c\/td\u003e\n        \u003ctd\u003e817275A5\u003c\/td\u003e\n        \u003ctd\u003e1596cc\/1731cc engines\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eFourStroke\u003c\/td\u003e\n        \u003ctd\u003e90\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2004–2015\u003c\/td\u003e\n        \u003ctd\u003e817275A5\u003c\/td\u003e\n        \u003ctd\u003e1596cc\/1731cc engines\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eFourStroke\u003c\/td\u003e\n        \u003ctd\u003e100\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2004–2015\u003c\/td\u003e\n        \u003ctd\u003e817275A5\u003c\/td\u003e\n        \u003ctd\u003e1596cc\/1731cc engines\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eFourStroke\u003c\/td\u003e\n        \u003ctd\u003e115\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2004–2015\u003c\/td\u003e\n        \u003ctd\u003e817275A5\u003c\/td\u003e\n        \u003ctd\u003e1741cc\/1731cc engines\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eFourStroke\u003c\/td\u003e\n        \u003ctd\u003e75\/80\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2015+\u003c\/td\u003e\n        \u003ctd\u003e817275A10\u003c\/td\u003e\n        \u003ctd\u003e2.1L engines\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eFourStroke\u003c\/td\u003e\n        \u003ctd\u003e90\/100\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2015+\u003c\/td\u003e\n        \u003ctd\u003e817275A10\u003c\/td\u003e\n        \u003ctd\u003e2.1L engines\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eFourStroke\u003c\/td\u003e\n        \u003ctd\u003e115\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2015+\u003c\/td\u003e\n        \u003ctd\u003e817275A10\u003c\/td\u003e\n        \u003ctd\u003e2.1L engines\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 OEM replacement\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eMetal alloy and neoprene rubber\u003c\/dd\u003e\n  \u003cdt\u003eKit Contents\u003c\/dt\u003e\n\u003cdd\u003eComplete water pump kit with impeller, housing, face plate, gaskets, and hardware\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\u003e1 x Water Pump Impeller \u003cspan style=\"color:#d0021b;\"\u003e(47-43026T2)\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003cli\u003e1 x Housing\u003c\/li\u003e\n  \u003cli\u003e1 x Face Plate\u003c\/li\u003e\n  \u003cli\u003e1 x Gasket\u003c\/li\u003e\n  \u003cli\u003e1 x Grommets\u003c\/li\u003e\n  \u003cli\u003e1 x Seal\u003c\/li\u003e\n  \u003cli\u003e1 x Cover\u003c\/li\u003e\n  \u003cli\u003e1 x Washer\u003c\/li\u003e\n  \u003cli\u003e1 x O-ring\u003c\/li\u003e\n  \u003cli\u003e1 x Impeller Key\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\u003eEnsure the engine is off and the battery is disconnected. Place the outboard in a secure, tilted position.\u003c\/li\u003e\n    \u003cli\u003eDrain the gearcase oil from the lower unit into a suitable container.\u003c\/li\u003e\n    \u003cli\u003eRemove the mounting bolts connecting the lower unit (gearcase) to the upper driveshaft housing.\u003c\/li\u003e\n    \u003cli\u003eCarefully separate the lower unit from the engine assembly. You may need to disconnect the shift shaft linkage.\u003c\/li\u003e\n    \u003cli\u003eUnbolt and remove the old water pump housing. Note the orientation of the old impeller vanes.\u003c\/li\u003e\n    \u003cli\u003eRemove the old impeller, key, gaskets, and wear plate. Thoroughly clean all mating surfaces.\u003c\/li\u003e\n    \u003cli\u003eInstall the new wear plate, gaskets, and impeller key. Slide the new impeller on while turning the driveshaft clockwise to set the vanes correctly.\u003c\/li\u003e\n    \u003cli\u003eApply a light coat of marine grease to the inside of the new housing and install it over the impeller.\u003c\/li\u003e\n    \u003cli\u003eTorque the housing bolts to the manufacturer's specifications.\u003c\/li\u003e\n    \u003cli\u003eReassemble the lower unit to the engine, ensuring the driveshaft, water tube, and shift shaft align correctly.\u003c\/li\u003e\n    \u003cli\u003eRefill the gearcase with fresh marine gear lube and reinstall the battery connection.\u003c\/li\u003e\n    \u003cli\u003eOnce assembled, test the engine using a water source (flushing muffs) to confirm proper water flow.\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 confirm this kit fits my specific engine?\u003c\/summary\u003e\n  \u003cp\u003eYour primary reference should be the engine compatibility table. Match your engine's brand, model, horsepower, and year range. For absolute certainty, cross-reference the OEM part number listed in the table with your engine's service manual.\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 inconsistent stream of water from the engine's tell-tale port, rising engine temperatures at idle or low speeds, and an overheating alarm. A visual inspection may show cracked, brittle, or missing impeller vanes.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should the water pump impeller be replaced?\u003c\/summary\u003e\n  \u003cp\u003eAs a general maintenance guideline, impellers should be inspected annually and replaced every 2-3 years, or every 200-300 hours of operation. This interval can be shorter if the engine is used frequently in sandy, silty, or saltwater conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this a complete kit for the job?\u003c\/summary\u003e\n  \u003cp\u003eYes, this kit includes all the necessary standard components for a water pump service: the impeller, housing, face plate, gaskets, seals, and related hardware. No other parts are typically required.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat's the difference between the 'A5' and 'A10' OEM part numbers?\u003c\/summary\u003e\n  \u003cp\u003eThe part numbers 817275A5 and 817275A10 correspond to different production runs and engine displacements (pre-2015 vs. 2015+ 2.1L engines, respectively). This aftermarket kit is designed to be compatible with both series, covering the full 2004 to present year range.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDo I need special tools for installation?\u003c\/summary\u003e\n  \u003cp\u003eBasic hand tools like a socket\/ratchet set, screwdrivers, and pliers are required. A torque wrench is highly recommended to tighten bolts to the manufacturer's specifications, and a gear lube pump will be needed to refill the lower unit.\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\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":50718257381691,"sku":"20KM002R1","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/20KM002R1.png?v=1762958214","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-kit-fits-mercury-mariner-75-115hp-4-stroke-replaces-817275a5-46-817275q05","provider":"SeaSierra","version":"1.0","type":"link"}