{"product_id":"outboard-impeller-fits-omc-brp-cobra-replaces-987176-3854072-18-30585","title":"Outboard Impeller – Fits OMC BRP Cobra (Replaces 987176, 3854072, 18-30585)","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\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  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\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\u003eOutboard Impeller\u003c\/strong\u003e is engineered for OMC BRP Cobra King all Models boat engines, delivering reliable water pump performance across the full range of compatible applications. Designed as a direct-fit replacement, this impeller ensures consistent cooling flow to protect your engine from overheating.\u003c\/p\u003e\n\u003cp\u003eThis part directly replaces OEM numbers 987176, 3854072, and 18-30585, providing seamless interchange compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDrop-in replacement for OMC BRP Cobra water pump assemblies\u003c\/li\u003e\n  \u003cli\u003ePrecision-molded for reliable seal and flow under operating conditions\u003c\/li\u003e\n  \u003cli\u003eCompatible with all Cobra King model boat engines\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\u003eOMC\u003c\/td\u003e\n        \u003ctd\u003e987176\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eBRP\u003c\/td\u003e\n        \u003ctd\u003e3854072\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-30585\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\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      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOMC\u003c\/td\u003e\n        \u003ctd\u003eBRP Cobra King (all models)\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\u003ePart Type\u003c\/dt\u003e\n  \u003cdd\u003eWater Pump Impeller\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eOutboard Marine Engine\u003c\/dd\u003e\n  \u003cdt\u003eFitment\u003c\/dt\u003e\n  \u003cdd\u003eOMC BRP Cobra King all Models\u003c\/dd\u003e\n  \u003cdt\u003eOEM Equivalents\u003c\/dt\u003e\n  \u003cdd\u003e987176, 3854072, 18-30585\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eOutboard Impeller × 1\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect power and allow engine to cool completely before beginning work.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit or water pump housing to access the existing impeller.\u003c\/li\u003e\n  \u003cli\u003eCarefully extract the old impeller, noting the direction of blade curvature.\u003c\/li\u003e\n  \u003cli\u003eInspect the impeller housing and wear plate for scoring or corrosion; replace if damaged.\u003c\/li\u003e\n  \u003cli\u003eLubricate the new impeller vanes with glycerin or soapy water—never petroleum-based grease.\u003c\/li\u003e\n  \u003cli\u003eInsert the impeller with blades oriented in the correct rotation direction.\u003c\/li\u003e\n  \u003cli\u003eReassemble the pump housing and lower unit, torquing fasteners to manufacturer specifications.\u003c\/li\u003e\n  \u003cli\u003eRun the engine with water supply and verify consistent cooling flow from the tell-tale.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if my impeller needs replacing?\u003c\/summary\u003e\n  \u003cp\u003eCommon signs include reduced or no water flow from the tell-tale, engine overheating, weak stream at idle, or visible cracks and missing vane tips during inspection. Replace impellers annually or every 100–150 hours of operation as preventive maintenance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this fit all OMC Cobra models?\u003c\/summary\u003e\n  \u003cp\u003eYes, this impeller is designed for OMC BRP Cobra King all models. Always verify your engine's existing impeller part number against the OEM equivalents listed (987176, 3854072, 18-30585) before purchasing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I install this myself?\u003c\/summary\u003e\n  \u003cp\u003eIf you have basic mechanical experience and the correct tools, installation is straightforward. Follow the outlined steps carefully, ensure correct blade orientation, and use proper lubrication. Professional installation is recommended if you are unsure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat type of lubricant should I use during installation?\u003c\/summary\u003e\n  \u003cp\u003eUse glycerin, dish soap solution, or dedicated impeller installation lubricant. Never use petroleum-based grease or oil, as these can damage the rubber and cause premature failure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should I replace my water pump impeller?\u003c\/summary\u003e\n  \u003cp\u003eReplace annually or every 100–150 operating hours, whichever comes first. More frequent replacement may be needed in sandy or debris-laden water, or if the engine has sat unused for extended periods.\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 against 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","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":51025914724667,"sku":"25IO054","price":19.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/25IO054.jpg?v=1773220642","url":"https:\/\/seasierra.com\/products\/outboard-impeller-fits-omc-brp-cobra-replaces-987176-3854072-18-30585","provider":"SeaSierra","version":"1.0","type":"link"}