{"product_id":"quicksilver-water-pump-repair-kit-821354a2-for-mercury-mariner-25-50hp-complete-impeller-seal-kit","title":"Quicksilver Water Pump Repair Kit 821354A2 for Mercury\/Mariner 25–50hp — Complete Impeller \u0026 Seal Kit","description":"\u003cp\u003e\u003cstrong\u003eQuicksilver 821354A2 is a complete water pump repair kit designed to restore cooling performance for select Mercury and Mariner 25–50hp outboard engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit gathers the essential replacement parts you need to service the water pump on compatible 2‑stroke and 4‑stroke outboards. Built to the specifications expected from Quicksilver — the original-equipment supplier for Mercury Marine — the kit simplifies a common maintenance job so you can get your engine back to reliable cooling without guessing which parts fit.\u003c\/p\u003e\n\n\u003ch3\u003eWhich outboards will this repair kit work with?\u003c\/h3\u003e\n\u003cp\u003eThis kit is intended for specified Mercury and Mariner outboards in the 25–50 horsepower range for both 2‑stroke and 4‑stroke models. Always verify the engine year and model against your owner's or service manual to confirm compatibility before purchasing. Using the correct kit avoids fitment problems and ensures the pump components function together as designed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits select Mercury and Mariner 25–50hp outboards\u003c\/li\u003e\n  \u003cli\u003eCompatible with both 2‑stroke and 4‑stroke configurations when specified\u003c\/li\u003e\n  \u003cli\u003eConfirm fit by checking engine model\/year in your manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat parts are included and why do they matter?\u003c\/h3\u003e\n\u003cp\u003eThe 821354A2 kit bundles the common wear items that determine water pump effectiveness: the impeller, drive key, face plate, gaskets, and the water tube seal. Replacing these components together restores proper water flow and sealing, reducing the risk of overheating or seal failure. Installing all supplied parts helps maintain correct clearances and alignment inside the pump housing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNew impeller — restores rotor action for consistent cooling flow\u003c\/li\u003e\n  \u003cli\u003eDrive key — secures impeller to the shaft for reliable power transfer\u003c\/li\u003e\n  \u003cli\u003eFace plate and gaskets — ensure correct pump chamber sealing and pressure\u003c\/li\u003e\n  \u003cli\u003eWater tube seal — prevents external leaks at the outlet connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is the replacement and what tools are needed?\u003c\/h3\u003e\n\u003cp\u003eReplacing a water pump is a routine service for most mechanically inclined boat owners but does require basic tools and attention to torque and alignment. If you follow the engine’s service manual steps, the job is typically straightforward; however, limited space on some lower units can make access fiddly. If uncertain, a certified marine mechanic will complete the swap quickly and verify cooling system integrity.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCommon hand tools: socket set, screwdrivers, pliers\u003c\/li\u003e\n  \u003cli\u003eTorque wrench to meet manufacturer fastener specs\u003c\/li\u003e\n  \u003cli\u003eService manual recommended for step-by-step guidance and torque values\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will replacing the pump parts affect engine performance?\u003c\/h3\u003e\n\u003cp\u003eInstalling fresh pump components helps reestablish correct water circulation through the engine, reducing the chance of overheating and improving long-term engine reliability. While it won’t increase power, consistent cooling preserves engine life and prevents heat-related damage. Regular maintenance with OEM parts helps keep factory tolerances and performance intact.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRestores consistent coolant flow to prevent overheating\u003c\/li\u003e\n  \u003cli\u003eMaintains factory-designed clearances for efficient pump action\u003c\/li\u003e\n  \u003cli\u003eReduces risk of leaks and related engine damage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Quicksilver 821354A2 water pump repair kit is aimed at boat owners, fleet operators, and marine technicians who service Mercury or Mariner outboards in the 25–50hp class. It’s suitable for anyone doing scheduled maintenance or repairing a deteriorated pump—especially those who prefer OEM-level components for fit and longevity. If you value exact-fit replacement parts and want to follow manufacturer guidance for cooling-system upkeep, this kit provides the core components needed to complete the job correctly.\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: Is this kit compatible with both 2-stroke and 4-stroke engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the 821354A2 fits select Mercury and Mariner 25–50hp 2‑stroke and 4‑stroke outboards; confirm your exact model\/year first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Should I replace all parts at once?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replacing the impeller, gaskets, face plate and seals together ensures proper pump clearance and reduces future failures.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Quicksilver","offers":[{"title":"Default Title","offer_id":48084145569950,"sku":"B003901ZXY","price":99.62,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/quicksilver-front-packaging.jpg?v=1785847350","url":"https:\/\/northtrailauto.ca\/products\/quicksilver-water-pump-repair-kit-821354a2-for-mercury-mariner-25-50hp-complete-impeller-seal-kit","provider":"North Trail Auto","version":"1.0","type":"link"}