{"product_id":"seasierra-outboard-water-pump-rebuild-kit-for-mercury-30-60-hp-complete-impeller-seals-gaskets","title":"SeaSierra Outboard Water Pump Rebuild Kit for Mercury 30–60 HP — Complete impeller, seals \u0026 gaskets","description":"\u003cp\u003e\u003cstrong\u003eThe SeaSierra 812966A12 Outboard Water Pump Kit is a full rebuild set engineered to restore cooling performance on Mercury 4-stroke 30–60 HP outboards.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit gathers all primary components needed to replace a worn or leaking gearcase water pump and return reliable raw-water flow to your lower unit. Designed to match OEM specifications and fit a range of Mercury horsepower models, the set includes impeller, housing parts, seals, gaskets, and hardware — everything a routine pump rebuild requires. Below you’ll find concise answers to common buyer questions, clear lists of included parts, and guidance on who benefits most from this kit.\u003c\/p\u003e\n\n\u003ch3\u003eWhat parts are included in the SeaSierra 812966A12 kit?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit is comprehensive so you won't need to source multiple small parts separately. It covers the internal impeller and the external mating pieces that commonly wear during normal use.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eHousing 14334A3 and Water Pump Base Assembly 812966A7\u003c\/li\u003e\n  \u003cli\u003eImpeller 19453T with Guide Tube 893857 and Key 19699\u003c\/li\u003e\n  \u003cli\u003eSeals and O-rings: Seal 830749 and O-Ring 805726\u003c\/li\u003e\n  \u003cli\u003eGaskets and faceplate: Lower Gasket 19701, Gasket 822189, Faceplate 19700A2\u003c\/li\u003e\n  \u003cli\u003eWashers and small hardware: Washer 12-858234, Washer 8M0204720\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I know this kit fits my Mercury outboard?\u003c\/h3\u003e\n\n\u003cp\u003eThis rebuild kit is specified for many Mercury 4-stroke outboards in the 30 to 60 HP range. It replaces multiple OEM part numbers and common aftermarket equivalents to simplify compatibility checks.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with Mercury 30HP, 35HP, 40HP, 50HP, 60HP 4-stroke engines\u003c\/li\u003e\n  \u003cli\u003eReplaces OEM numbers: 46-812966A12, 46-812966A10, 46-14334A3, and related series\u003c\/li\u003e\n  \u003cli\u003eAlso fits aftermarket references such as Sierra 18-3690 and GLM 12124\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen should I replace my outboard water pump with this kit?\u003c\/h3\u003e\n\n\u003cp\u003eSwap the pump components if you notice reduced water discharge, overheating warnings, or visible deterioration of the impeller. Many owners perform a rebuild as preventative maintenance every few seasons or after extended storage.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSigns to replace: low water stream from the telltale, overheating, or cracked impeller\u003c\/li\u003e\n  \u003cli\u003eRecommended intervals: inspect annually; replace impeller every 1–3 years depending on use\u003c\/li\u003e\n  \u003cli\u003eIncludes common wear parts so a single service visit can fully refresh the pump\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat tools and skills are needed to install this rebuild kit?\u003c\/h3\u003e\n\n\u003cp\u003eBasic mechanical ability and common marine tools cover most installations; however, lower-unit removal and correct torqueing are required for a proper seal. If you’re unfamiliar with outboard servicing, a qualified marine mechanic can install the kit quickly and ensure gaskets and seals seat correctly.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTypical tools: socket set, screwdrivers, gasket scraper, marine grease\u003c\/li\u003e\n  \u003cli\u003eTime estimate: 1–3 hours for experienced DIYers; longer if lower unit removal is needed\u003c\/li\u003e\n  \u003cli\u003eTip: replace all gaskets and seals included in the kit to prevent leaks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The SeaSierra 812966A12 kit is aimed at boat owners, marinas, and technicians who maintain Mercury 4-stroke outboards in the 30–60 HP range and want an all-in-one repair pack. It’s suited for preventative maintenance, seasonal rebuilds, and mid-life repairs when the impeller, housing, or seals show wear. If you need OEM-equivalent replacements without hunting multiple part numbers, this kit consolidates the necessary components into a single serviceable package.\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: Does this kit fit Mercury 40 HP 4-stroke engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The SeaSierra 812966A12 kit is compatible with Mercury 30–60 HP 4-stroke outboards, including 40 HP models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are all necessary seals and gaskets included?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit contains seals, O-ring, faceplate, and lower gaskets so you can complete a full pump rebuild.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":48084135215262,"sku":"B0DR7RLNVB","price":85.25,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/seasierra-front-packaging-assembly.jpg?v=1785847156","url":"https:\/\/northtrailauto.ca\/products\/seasierra-outboard-water-pump-rebuild-kit-for-mercury-30-60-hp-complete-impeller-seals-gaskets","provider":"North Trail Auto","version":"1.0","type":"link"}