{"product_id":"aa-ignition-marine-raw-water-pump-impeller-kit-for-mercruiser-350-502-engines-includes-gaskets-2-year-warranty","title":"AA Ignition Marine Raw Water Pump Impeller Kit for MerCruiser 350–502 Engines — Includes Gaskets \u0026 2-Year Warranty","description":"\u003cp\u003e\u003cstrong\u003eAA Ignition's Marine Raw Water Pump Impeller Kit is a plug-and-play replacement that renews cooling flow for compatible MerCruiser engines, restoring reliable raw-water circulation and preventing overheating due to a worn impeller.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBoats need consistent seawater flow to keep engine temperatures in check; a degraded impeller is a common source of cooling loss. This kit includes a flexible marine-grade impeller plus the necessary gaskets and seals to rebuild the raw water pump quickly without modifications. It cross-references MerCruiser part numbers 807151A14, 18-3150AA and others, offering an economical alternative engineered to meet OEM fit and performance standards and backed by a two-year warranty.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I know this impeller kit fits my MerCruiser engine?\u003c\/h3\u003e\n\u003cp\u003eCompatibility is determined by matching the original part number or confirming your engine model. This kit replaces OEM numbers like 807151A14 and fits a range of MerCruiser blocks including 350 Magnum MPI Alpha\/Bravo, 357, 383, 454, 502 and select SCi and GEN+ variants.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMatch any of the listed OEM cross-reference numbers on your old part.\u003c\/li\u003e\n  \u003cli\u003eConfirm engine model: 350 Magnum MPI Alpha\/Bravo, 357 Alpha\/Bravo 4V, 383, 454 MPI, 502 MPI and more.\u003c\/li\u003e\n  \u003cli\u003eCheck the full compatibility chart before ordering to guarantee correct fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the kit and what tools will I need?\u003c\/h3\u003e\n\u003cp\u003eThe kit contains the impeller, gaskets and seals required to reseal the pump housing. Because it’s designed as a direct-fit replacement, installation is straightforward for anyone comfortable with basic marine maintenance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncluded: marine-grade rubber impeller, matching gaskets and seals for a complete rebuild.\u003c\/li\u003e\n  \u003cli\u003eRecommended tools: screwdriver set, pliers, gasket scraper, marine grease, torque wrench as needed.\u003c\/li\u003e\n  \u003cli\u003eEstimated time: 30–60 minutes for most installations depending on access and experience.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will this kit improve my boat's cooling performance?\u003c\/h3\u003e\n\u003cp\u003eReplacing a worn or shredded impeller restores proper pumping action and seawater flow, reducing the risk of overheating and associated engine damage. The flexible impeller profile is engineered to maintain a reliable seal and consistent flow through the cooling circuit under normal operating conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRestores raw-water flow to the heat exchanger and engine jacket.\u003c\/li\u003e\n  \u003cli\u003eImproves pressure and removes cavitation caused by damaged vanes.\u003c\/li\u003e\n  \u003cli\u003eHelps prevent overheating and reduces corrosion risk from inadequate coolant circulation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: This impeller kit is intended for boat owners, DIY mechanics and marine technicians who operate MerCruiser-powered vessels and need a dependable, cost-effective replacement for worn raw water pump components. It's especially useful for seasonal maintenance, pre-launch checks, or keeping a spare on board to avoid downtime. If you require an exact OEM badge, consult your dealer; if you want an engineered direct-fit rebuild kit with warranty protection and broad MerCruiser compatibility, this product is a practical choice.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I replace this impeller?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replace the impeller every season or whenever signs of wear, cracking, or shredded vanes appear to maintain reliable cooling.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this kit include gaskets and seals?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the kit includes the impeller plus the gaskets and seals needed for a complete raw water pump rebuild.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AA Ignition","offers":[{"title":"Default Title","offer_id":48083971834014,"sku":"B07W5DJWHP","price":71.73,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/aa-ignition-impeller-front-packaging.jpg?v=1785841709","url":"https:\/\/northtrailauto.ca\/products\/aa-ignition-marine-raw-water-pump-impeller-kit-for-mercruiser-350-502-engines-includes-gaskets-2-year-warranty","provider":"North Trail Auto","version":"1.0","type":"link"}