{"product_id":"water-pump-impeller-fits-yamaha-6hp-8hp-2-stroke-outboards-replaces-6g1-44352-00-00-47-11590m","title":"Water Pump Impeller – Fits Yamaha 6HP \u0026 8HP 2-Stroke Outboards (Replaces 6G1-44352-00-00, 47-11590M)","description":"\u003csection\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\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eWater Pump Impeller\u003c\/strong\u003e provides a reliable, direct-fit cooling solution for Yamaha 6HP and 8HP 2-stroke outboard engines manufactured from 1984 to 2009. Engineered to restore cooling efficiency, it is a critical component for preventing engine overheating and maintaining peak performance.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct cross-reference for several original and aftermarket parts, including Yamaha 6G1-44352-00-00, Sierra 18-3066, and Mercury\/Mariner 47-11590M.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for direct replacement, ensuring a straightforward installation process.\u003c\/li\u003e\n\u003cli\u003eConstructed from high-grade neoprene rubber with a hardened nylon hub for durability in marine environments.\u003c\/li\u003e\n\u003cli\u003eRequires lubrication with silicone grease, glycerine, or dish soap during installation for proper function.\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\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6G1-44352-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3066\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n        \u003ctd\u003e47-11590M\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCEF\u003c\/td\u003e\n        \u003ctd\u003e500302\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMallory\u003c\/td\u003e\n        \u003ctd\u003e9-45610\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 Yamaha owners: This impeller fits a wide range of 6HP and 8HP two-stroke models from 1984 onwards. Please verify your specific model code against the detailed list to ensure a correct match.\u003c\/p\u003e\n\u003cp\u003eFor Mariner owners: This part is compatible with specific 6HP and 8HP two-stroke models identified by serial number prefixes. Check your engine's serial number to confirm fitment as noted in the table.\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\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6HP\u003c\/td\u003e\n        \u003ctd\u003e6\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1986–2009\u003c\/td\u003e\n        \u003ctd\u003e6G1-44352-00-00\u003c\/td\u003e\n        \u003ctd\u003eCovers models 6SJ, 6LJ, 6LH, 6SH, 6LG, 6SG, 6LF, 6SF, 6LD, 6SD, 6MLHP, 6MSHP, 6MLHQ, 6MSHQ, 6MLHR, 6MSHR, 6MLHS, 6MSHS, 6MLHT, 6MSHT, 6MLHU, 6MSHU, 6MLHV, 6MSHV, 6MLHW, 6MSHW, 6MLHX, 6MSHX, 6MLHY, 6MSHY\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e8HP\u003c\/td\u003e\n        \u003ctd\u003e8\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1984–2009\u003c\/td\u003e\n        \u003ctd\u003e6G1-44352-00-00\u003c\/td\u003e\n        \u003ctd\u003eCovers models 8LN, 8SN, 8LJ, 8SJ, 8LK, 8SK, 8LH, 8SH, 8LG, 8SG, 8LF, 8SF, 8LD, 8SD, 8MLHP, 8MSHP, 8MLHQ, 8MSHQ, 8MLHR, 8MSHR, 8MLHS, 8MSHS, 8MLHT, 8MSHT, 8MLHU, 8MSHU, 8MLHV, 8MSHV, 8MLHW, 8MSHW, 8MLHX, 8MSHX, 8MLHY, 8MSHY, 8MSHA, 8MSHZ, 8MSHB, 8MSHC, 8MSHD, 8MSH (2005–2009)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e6C\u003c\/td\u003e\n        \u003ctd\u003e6\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAll Years\u003c\/td\u003e\n        \u003ctd\u003e47-11590M\u003c\/td\u003e\n        \u003ctd\u003eFor models with serial numbers beginning with 6H8\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e6D\u003c\/td\u003e\n        \u003ctd\u003e6\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAll Years\u003c\/td\u003e\n        \u003ctd\u003e47-11590M\u003c\/td\u003e\n        \u003ctd\u003eFor models with serial numbers beginning with 6H6\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e8C\u003c\/td\u003e\n        \u003ctd\u003e8\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAll Years\u003c\/td\u003e\n        \u003ctd\u003e47-11590M\u003c\/td\u003e\n        \u003ctd\u003eFor models with serial numbers beginning with 6G1\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\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eNeoprene rubber with hardened nylon hub\u003c\/dd\u003e\n  \u003cdt\u003eNumber of Blades\u003c\/dt\u003e\n\u003cdd\u003e6\u003c\/dd\u003e\n  \u003cdt\u003eImpeller Height\u003c\/dt\u003e\n\u003cdd\u003e18.0 mm (0.71 inch)\u003c\/dd\u003e\n  \u003cdt\u003eOverall Diameter\u003c\/dt\u003e\n\u003cdd\u003e40.0 mm (1.57 inch)\u003c\/dd\u003e\n  \u003cdt\u003eHub Shaft Diameter\u003c\/dt\u003e\n\u003cdd\u003e11.9 mm (0.47 inch)\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e10 g (0.35 oz)\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eRequires lubrication with silicone grease, glycerine or dish soap during installation\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 (Replaces 6G1-44352-00-00 \/ 47-11590M)\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 turn off the fuel supply for safety.\u003c\/li\u003e\n\u003cli\u003ePlace a drain pan under the lower unit and remove the gearcase oil drain screw to empty the oil.\u003c\/li\u003e\n\u003cli\u003eRemove the bolts that secure the lower unit (gearcase) to the engine's upper casing.\u003c\/li\u003e\n\u003cli\u003eCarefully separate and lower the gearcase assembly to expose the water pump housing.\u003c\/li\u003e\n\u003cli\u003eUnscrew the bolts on the water pump housing and remove the cover and any gaskets.\u003c\/li\u003e\n\u003cli\u003eSlide the old impeller off the driveshaft. You may need to gently pry it off. Note the orientation of the vanes.\u003c\/li\u003e\n\u003cli\u003eThoroughly clean any old gasket material, sediment, or debris from the housing, wear plate, and cover.\u003c\/li\u003e\n\u003cli\u003eApply a light coat of marine-grade silicone grease, glycerine, or simple dish soap to the inside of the pump housing and to the new impeller.\u003c\/li\u003e\n\u003cli\u003eAlign the keyway and slide the new impeller onto the driveshaft. Turn the driveshaft clockwise to help bend the vanes into the correct orientation inside the housing.\u003c\/li\u003e\n\u003cli\u003eReinstall the water pump cover, using new gaskets if included, and tighten the bolts to the manufacturer's specified torque.\u003c\/li\u003e\n\u003cli\u003eCarefully guide the driveshaft and water tube back into position as you reattach the lower unit to the engine. Secure all bolts.\u003c\/li\u003e\n\u003cli\u003eRefill the gearcase with the correct type and amount of marine gear lube 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\u003eHow do I confirm this impeller fits my outboard engine?\u003c\/summary\u003e\n  \u003cp\u003eThe most reliable method is to check your engine's model, year, and serial number against the Engine \u0026amp; Model Compatibility table on this page. For Mariner models, serial number verification is critical. If in doubt, compare the technical specifications and images to your old part 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 running hotter than normal, an intermittent or weak water stream from the \"tell-tale\" outlet, and visible cracking or brittleness on the old impeller's rubber vanes upon 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 replace the water pump impeller every 1-2 years or every 100-200 hours of operation, depending on usage conditions (e.g., saltwater vs. freshwater).\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs special lubrication required for installation?\u003c\/summary\u003e\n  \u003cp\u003eYes. To prevent damage to the impeller during first startup, you must lubricate the interior of the pump housing and the new impeller with silicone grease, glycerine, or dish soap. Do not install it dry.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the difference between this aftermarket part and an OEM one?\u003c\/summary\u003e\n  \u003cp\u003eThis part is manufactured to meet or exceed OEM specifications for fit, form, and function, using comparable high-quality materials like neoprene rubber and a hardened nylon hub. It offers a cost-effective alternative to the original manufacturer's part without sacrificing performance or durability.\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\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":50723979723067,"sku":"17IY004OC","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/17IY004OC.png?v=1763039179","url":"https:\/\/seasierra.com\/products\/water-pump-impeller-fits-yamaha-6hp-8hp-2-stroke-outboards-replaces-6g1-44352-00-00-47-11590m","provider":"SeaSierra","version":"1.0","type":"link"}