{"product_id":"sierra-marine-water-pump-impeller-kit-18-3077","title":"Sierra Marine Water Pump Impeller Kit 18-3077 – MerCruiser \/ OMC Raw Water Pump Service Kit","description":"\u003cp data-start=\"222\" data-end=\"524\"\u003eThe \u003cstrong data-start=\"226\" data-end=\"268\"\u003eSierra 18-3077 Water Pump Impeller Kit\u003c\/strong\u003e is a complete service kit designed to restore proper cooling system performance in MerCruiser and OMC marine engines. This kit includes a high-quality flexible impeller along with essential gaskets, O-rings, and seals needed to service the raw water pump.\u003c\/p\u003e\n\u003cp data-start=\"526\" data-end=\"838\"\u003eThe impeller is responsible for circulating cooling water through the engine. Over time, the rubber vanes can wear, harden, or break down, reducing water flow and increasing the risk of overheating. Replacing the impeller and sealing components ensures reliable cooling and helps protect your engine from damage.\u003c\/p\u003e\n\u003cp data-start=\"840\" data-end=\"978\"\u003eManufactured to meet or exceed OEM specifications, this kit delivers dependable performance in both freshwater and saltwater environments.\u003c\/p\u003e\n\u003chr data-start=\"980\" data-end=\"983\"\u003e\n\u003ch2 data-start=\"985\" data-end=\"1004\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"988\" data-end=\"1004\"\u003eKey Features\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-start=\"1005\" data-end=\"1265\"\u003e\n\u003cli data-start=\"1005\" data-end=\"1053\"\u003eComplete raw water pump impeller service kit\u003c\/li\u003e\n\u003cli data-start=\"1054\" data-end=\"1102\"\u003eIncludes impeller, gasket, O-ring, and seals\u003c\/li\u003e\n\u003cli data-start=\"1103\" data-end=\"1148\"\u003eRestores proper cooling water circulation\u003c\/li\u003e\n\u003cli data-start=\"1149\" data-end=\"1187\"\u003eOEM-equivalent fit and performance\u003c\/li\u003e\n\u003cli data-start=\"1188\" data-end=\"1228\"\u003eDurable marine-grade rubber impeller\u003c\/li\u003e\n\u003cli data-start=\"1229\" data-end=\"1265\"\u003eSierra limited lifetime warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1267\" data-end=\"1270\"\u003e\n\u003ch2 data-start=\"1272\" data-end=\"1299\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1275\" data-end=\"1299\"\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 data-start=\"1301\" data-end=\"1327\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1305\" data-end=\"1327\"\u003eMerCruiser Engines\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1328\" data-end=\"1404\"\u003e\n\u003cli data-start=\"1328\" data-end=\"1349\"\u003eAlpha One (Gen I)\u003c\/li\u003e\n\u003cli data-start=\"1350\" data-end=\"1363\"\u003eMR drives\u003c\/li\u003e\n\u003cli data-start=\"1364\" data-end=\"1404\"\u003eSelect MerCruiser sterndrive engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1406\" data-end=\"1429\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1410\" data-end=\"1429\"\u003eOMC Sterndrives\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1430\" data-end=\"1477\"\u003e\n\u003cli data-start=\"1430\" data-end=\"1449\"\u003eStringer drives\u003c\/li\u003e\n\u003cli data-start=\"1450\" data-end=\"1477\"\u003eSelect OMC applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1479\" data-end=\"1545\"\u003e➡️ Designed for engines using compatible raw water pump assemblies\u003c\/p\u003e\n\u003chr data-start=\"1547\" data-end=\"1550\"\u003e\n\u003ch2 data-start=\"1552\" data-end=\"1589\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1555\" data-end=\"1587\"\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"1590\" data-end=\"1609\"\u003eFitment depends on:\u003c\/p\u003e\n\u003cul data-start=\"1610\" data-end=\"1699\"\u003e\n\u003cli data-start=\"1610\" data-end=\"1643\"\u003eDrive type (Alpha \/ MR \/ OMC)\u003c\/li\u003e\n\u003cli data-start=\"1644\" data-end=\"1674\"\u003ePump housing configuration\u003c\/li\u003e\n\u003cli data-start=\"1675\" data-end=\"1699\"\u003eEngine serial number\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1701\" data-end=\"1725\"\u003e⚠️ Always confirm using:\u003c\/p\u003e\n\u003cul data-start=\"1726\" data-end=\"1790\"\u003e\n\u003cli data-start=\"1726\" data-end=\"1750\"\u003eEngine serial number\u003c\/li\u003e\n\u003cli data-start=\"1751\" data-end=\"1790\"\u003eOEM part number match (\u003cstrong data-start=\"1776\" data-end=\"1787\"\u003e18-3077\u003c\/strong\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1792\" data-end=\"1795\"\u003e\n\u003ch2 data-start=\"1797\" data-end=\"1836\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1800\" data-end=\"1836\"\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"1837\" data-end=\"1876\"\u003eReplace the impeller kit if you notice:\u003c\/p\u003e\n\u003cul data-start=\"1877\" data-end=\"2029\"\u003e\n\u003cli data-start=\"1877\" data-end=\"1902\"\u003eWeak or no water flow\u003c\/li\u003e\n\u003cli data-start=\"1903\" data-end=\"1925\"\u003eEngine overheating\u003c\/li\u003e\n\u003cli data-start=\"1926\" data-end=\"1971\"\u003eCracked, missing, or stiff impeller vanes\u003c\/li\u003e\n\u003cli data-start=\"1972\" data-end=\"2002\"\u003eReduced cooling efficiency\u003c\/li\u003e\n\u003cli data-start=\"2003\" data-end=\"2029\"\u003eAfter seasonal storage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2031\" data-end=\"2092\"\u003eRecommended service interval: \u003cstrong data-start=\"2061\" data-end=\"2092\"\u003eevery 100 hours or annually\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"2094\" data-end=\"2097\"\u003e\n\u003ch2 data-start=\"2099\" data-end=\"2124\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2102\" data-end=\"2124\"\u003eInstallation Notes\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-start=\"2125\" data-end=\"2330\"\u003e\n\u003cli data-start=\"2125\" data-end=\"2167\"\u003eLubricate impeller before installation\u003c\/li\u003e\n\u003cli data-start=\"2168\" data-end=\"2206\"\u003eInstall with correct vane rotation\u003c\/li\u003e\n\u003cli data-start=\"2207\" data-end=\"2249\"\u003eReplace all included seals and gaskets\u003c\/li\u003e\n\u003cli data-start=\"2250\" data-end=\"2289\"\u003eInspect pump housing and wear plate\u003c\/li\u003e\n\u003cli data-start=\"2290\" data-end=\"2330\"\u003eEnsure proper key alignment on shaft\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2332\" data-end=\"2335\"\u003e\n\u003ch2 data-start=\"2337\" data-end=\"2379\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2340\" data-end=\"2379\"\u003eAlternate \/ Superseded Part Numbers\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 data-start=\"2381\" data-end=\"2409\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2385\" data-end=\"2409\"\u003eOEM Cross References\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2410\" data-end=\"2497\"\u003e\n\u003cli data-start=\"2410\" data-end=\"2466\"\u003eMercury \/ MerCruiser: \u003cstrong data-start=\"2434\" data-end=\"2448\"\u003e47-89984T4\u003c\/strong\u003e, \u003cstrong data-start=\"2450\" data-end=\"2464\"\u003e47-89984T2\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2467\" data-end=\"2497\"\u003eOMC: \u003cstrong data-start=\"2474\" data-end=\"2484\"\u003e777128\u003c\/strong\u003e, \u003cstrong data-start=\"2486\" data-end=\"2497\"\u003e3854286\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2499\" data-end=\"2502\"\u003e\n\u003ch3 data-start=\"2504\" data-end=\"2540\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2508\" data-end=\"2540\"\u003eAftermarket Cross References\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2541\" data-end=\"2606\"\u003e\n\u003cli data-start=\"2541\" data-end=\"2564\"\u003eSierra: \u003cstrong data-start=\"2551\" data-end=\"2562\"\u003e18-3077\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2565\" data-end=\"2589\"\u003eMallory: \u003cstrong data-start=\"2576\" data-end=\"2587\"\u003e9-45605\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2590\" data-end=\"2606\"\u003eGLM: \u003cstrong data-start=\"2597\" data-end=\"2606\"\u003e12024\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2608\" data-end=\"2611\"\u003e\n\u003ch2 data-start=\"2613\" data-end=\"2630\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2616\" data-end=\"2628\"\u003eShipping\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"2631\" data-end=\"2696\"\u003eShipping: Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e\n\u003chr data-start=\"2698\" data-end=\"2701\"\u003e\n\u003ch3 data-start=\"2703\" data-end=\"2730\"\u003e💡 Parts Desk Insight\u003c\/h3\u003e\n\u003cp data-start=\"2731\" data-end=\"2921\"\u003eOn Alpha and older OMC drives, the impeller is the first thing to go when cooling issues start. Even if it still looks okay, the rubber can lose flexibility and reduce water flow under load.\u003c\/p\u003e\n\u003cp data-start=\"2923\" data-end=\"3032\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eDoing the full kit instead of just the impeller helps ensure proper sealing and longer-lasting performance 👍\u003c\/p\u003e","brand":"WEST","offers":[{"title":"Default Title","offer_id":43564076466212,"sku":"18-3077","price":94.22,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/7e23daef-0e46-43dc-a646-8e7b86a7a831.png?v=1774224727","url":"https:\/\/marisolmarine.com\/products\/sierra-marine-water-pump-impeller-kit-18-3077","provider":"Marisol Marine Company","version":"1.0","type":"link"}