{"product_id":"ghmarine-70941a3-water-pump-impeller-kit-for-mercury","title":"GHmarine water pump impeller repair kit for Mercury outboard, 2 Stroke 4-9.8 HP, full seal and hardware kit","description":"\u003cp\u003e\u003cstrong\u003eGHmarine 70941A3 is a complete water pump impeller repair kit engineered to replace the worn impeller and related components on Mercury\/Mariner\/Force 4–9.8 HP outboards.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your small outboard is losing cooling flow, smoking, or running hot, a damaged impeller or degraded seal in the lower unit is a common cause. The GHmarine 70941A3 kit contains the impeller and all the associated components needed to restore proper raw-water circulation on many Mercury Marine 1975–1986 4hp through 9.8hp engines. It’s sold as a direct-fit aftermarket replacement for Mercury part number 46-70941A3 and Sierra 18-3446, and includes the pieces mechanics typically replace during a pump rebuild.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines and years does this kit fit?\u003c\/h3\u003e\n\u003cp\u003eThis repair kit is intended for older Mercury\/Mariner\/Force outboard models spanning small horsepower ranges. It matches the OEM geometry and mounting pattern used on many vintage lower units, so it fits units where the original parts list cites 46-70941A3 or Sierra 18-3446.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with Mercury Marine 4hp, 4.5hp, 7.5hp, and 9.8hp outboards\u003c\/li\u003e\n  \u003cli\u003eCovers model years approximately 1975–1986\u003c\/li\u003e\n  \u003cli\u003eDesigned as a replacement for Mercury 46-70941A3 and Sierra 18-3446\u003c\/li\u003e\n  \u003cli\u003eGood for Mariner and Force-branded variants sharing the same pump layout\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat parts are included and why they matter?\u003c\/h3\u003e\n\u003cp\u003eThe kit provides a full set of pump components typically replaced during a routine impeller service. Replacing the impeller alone can help, but renewing plates, seals, and hardware restores proper clearances and reduces the chance of repeat failure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRubber impeller — the impeller blades move coolant through the engine\u003c\/li\u003e\n  \u003cli\u003eImpeller plate and housing assembly — maintains correct pump clearance\u003c\/li\u003e\n  \u003cli\u003eSeal and cover assembly — prevents leaks and keeps pressure steady\u003c\/li\u003e\n  \u003cli\u003eKey and mounting hardware — secures the impeller to the shaft for correct timing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I know if my water pump needs this kit?\u003c\/h3\u003e\n\u003cp\u003eSigns of a failing pump include reduced cooling flow at the telltale, engine overheating, or visible damage to the old impeller during inspection. Routine maintenance intervals on older outboards often call for inspecting and replacing the impeller every season or every 100 hours, whichever comes first.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLow or no telltale stream at idle indicates worn impeller blades\u003c\/li\u003e\n  \u003cli\u003eEngine running hotter than normal under load suggests reduced coolant flow\u003c\/li\u003e\n  \u003cli\u003eVisible cracks, missing blades, or hardened rubber on the removed impeller confirm replacement is needed\u003c\/li\u003e\n  \u003cli\u003eReplace other pump components when performing impeller service to ensure longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and what should I prepare?\u003c\/h3\u003e\n\u003cp\u003eInstallation requires basic mechanical skills and common tools. It’s a straightforward job for anyone comfortable removing the lower unit and handling shaft alignment, but a service manual or step-by-step guide is helpful for torque specs and proper reassembly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLower unit removal and pump cover disassembly are necessary steps\u003c\/li\u003e\n  \u003cli\u003eLubricate the new impeller and align the key on the driveshaft as directed\u003c\/li\u003e\n  \u003cli\u003eReplace gaskets and seals to avoid leaks; torque fasteners to manufacturer specs\u003c\/li\u003e\n  \u003cli\u003eIf unsure, consult a qualified marine mechanic for correct installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The GHmarine 70941A3 kit is aimed at boat owners, marina technicians, and DIY mechanics who maintain older Mercury, Mariner, or Force outboards in the 4–9.8 HP range. It’s ideal for those restoring vintage small engines, performing seasonal maintenance, or replacing a failed pump with a direct-fit aftermarket alternative to Mercury 46-70941A3 and Sierra 18-3446. If you’re uncertain about compatibility with your specific model year or numbering, contact the seller with your engine serial number for precise fitment guidance.\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 GHmarine kit replace Mercury part 46-70941A3?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it’s a direct-fit aftermarket replacement for Mercury 46-70941A3 and Sierra 18-3446.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I install this on a 1980 9.8 HP outboard myself?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: If you can remove the lower unit and follow torque specs, yes; otherwise use a marine mechanic.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GHmarine","offers":[{"title":"Default Title","offer_id":48022088056993,"sku":"B07Q86CX47","price":80.31,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/6532\/5729\/files\/ghmarine-70941a3-front-packaging.jpg?v=1791324485","url":"https:\/\/canadiansporting.ca\/products\/ghmarine-70941a3-water-pump-impeller-kit-for-mercury","provider":"Canadian Sporting","version":"1.0","type":"link"}