{"product_id":"water-pump-impeller-fits-mercury-mariner-2-2-5-3-3-3-4-5-6-hp-replaces-47-16154-47-161543","title":"Water Pump Impeller – Fits Mercury\/Mariner 2\/2.5\/3\/3.3\/4\/5\/6 HP (Replaces 47-16154, 47-161543)","description":"\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\u003eThe Sea Sierra \u003cstrong\u003eWater Pump Impeller – Fits Mercury Marine 2\/2.5\/3\/3.3\/4\/5\/6 HP Outboards (Replaces 47-16154, 47-161543)\u003c\/strong\u003e is an essential replacement part for specific Mercury and Mariner outboard motors. It is designed for 2-Stroke 3.3 HP models (1993 \u0026amp; up), 2-Stroke 4\/5 HP models (1987 \u0026amp; up), and 4-Stroke 4\/5\/6 HP models (1999 \u0026amp; up).\u003c\/p\u003e\n  \u003cp\u003eThis impeller directly interchanges with Mercury 47-16154\/47-161543, Sierra 18-3098, Mallory 9-45302\/9-45302-10, and QuickMarine 161543.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eInstallation: A direct replacement for a straightforward fit.\u003c\/li\u003e\n    \u003cli\u003eManufacturing: The Sierra version is quality-made in Italy.\u003c\/li\u003e\n    \u003cli\u003eWarranty: Backed by Sierra's Limited Lifetime Warranty.\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\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e47-16154 \/ 47-161543\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eSierra\u003c\/td\u003e\n          \u003ctd\u003e18-3098\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMallory\u003c\/td\u003e\n          \u003ctd\u003e9-45302 \/ 9-45302-10\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eQuickMarine\u003c\/td\u003e\n          \u003ctd\u003e161543\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 owners, check your engine series, horsepower, and year range to ensure a 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\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\/Mariner\u003c\/td\u003e\n          \u003ctd\u003eShiftable\u003c\/td\u003e\n          \u003ctd\u003e3.3\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1993 \u0026amp; Up\u003c\/td\u003e\n          \u003ctd\u003e47-161543\/47-16154\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n          \u003ctd\u003eStandard\u003c\/td\u003e\n          \u003ctd\u003e4\/5\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1987 \u0026amp; Up\u003c\/td\u003e\n          \u003ctd\u003e47-161543\/47-16154\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n          \u003ctd\u003e4\/5\/6\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1999 \u0026amp; Up\u003c\/td\u003e\n          \u003ctd\u003e47-161543\/47-16154\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\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 Color\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n    \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e0.04 kg (0.09 lb)\u003c\/dd\u003e\n    \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003eLimited Lifetime (Sierra)\u003c\/dd\u003e\n    \u003cdt\u003eCountry of Manufacture\u003c\/dt\u003e\n\u003cdd\u003eItaly (Sierra version)\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 (47-161543\/47-16154)\u003c\/li\u003e\n    \u003cli\u003e1 x Gasket (included with QuickMarine kit)\u003c\/li\u003e\n    \u003cli\u003e1 x Key Pin (included with QuickMarine kit)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the battery and drain the lower unit gear oil.\u003c\/li\u003e\n    \u003cli\u003eUnbolt and remove the lower unit from the engine.\u003c\/li\u003e\n    \u003cli\u003eRemove the bolts on the water pump housing to access the impeller.\u003c\/li\u003e\n    \u003cli\u003eSlide the old impeller off the driveshaft, removing the drive key.\u003c\/li\u003e\n    \u003cli\u003eClean the housing, plate, and surrounding areas. Inspect for scoring or grooves.\u003c\/li\u003e\n    \u003cli\u003eLightly lubricate the new impeller and the inside of the housing with marine grease.\u003c\/li\u003e\n    \u003cli\u003eInstall the new key, slide the new impeller onto the driveshaft, and turn it clockwise to seat the vanes.\u003c\/li\u003e\n    \u003cli\u003eReinstall the water pump housing and torque the bolts to manufacturer specifications.\u003c\/li\u003e\n    \u003cli\u003eReattach the lower unit and refill with fresh gear oil.\u003c\/li\u003e\n    \u003cli\u003eReconnect the battery and test the engine in water, confirming a steady stream from the tell-tale outlet.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\u003csummary\u003eHow do I know if this impeller fits my outboard?\u003c\/summary\u003e\u003cp\u003eCheck your engine's model, horsepower, and year against the \"Engine \u0026amp; Model Compatibility\" table. You can also verify by cross-referencing your existing impeller's part number with our \"Part Number Matrix.\"\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat are the signs of a failing water pump impeller?\u003c\/summary\u003e\u003cp\u003eCommon symptoms include a weak or absent water stream from the \"telltale\" outlet, engine overheating alarms, and in severe cases, steam from the exhaust.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eHow often should I replace my impeller?\u003c\/summary\u003e\u003cp\u003eAs a preventative measure, we recommend replacing your impeller every 1-2 years or every 100-200 hours of use, especially if you operate in saltwater or sandy\/silty conditions.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eIs this part difficult to install?\u003c\/summary\u003e\u003cp\u003eInstallation can be done by a mechanically inclined owner with the right tools. It involves removing the lower unit. If you are not comfortable with this process, we recommend professional installation.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eIs a gasket included?\u003c\/summary\u003e\u003cp\u003ePackage contents can vary. The QuickMarine kit includes a gasket and key pin, but this is not guaranteed for all aftermarket or OEM versions. Review the \"What’s in the Box\" section for details specific to this listing.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\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\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\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\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":50723790487867,"sku":"24KM100-QM","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/24KM100-QM.png?v=1763031863","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-fits-mercury-mariner-2-2-5-3-3-3-4-5-6-hp-replaces-47-16154-47-161543","provider":"SeaSierra","version":"1.0","type":"link"}