{"product_id":"mercury-key-28-8m0032831","title":"Mercury – Impeller Key | Cooling System Component | Stainless Steel | 8M0032831","description":"\u003ch2\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury – Impeller Key | Cooling System Component | Stainless Steel | 8M0032831\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOverview\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThere are a few pieces on an outboard that don’t look like much at first glance, yet you realize just how vital they are the moment something goes wrong. The impeller key is one of those quiet heroes. It’s a small part, sure, but when you’re pushing across a glassy bay at sunrise or easing into a tight slip after a long day on the water, you want every single component in your cooling system doing its job without hesitation. This one gives you that peace of mind. It locks into place, stays put, and keeps your engine’s cooling water flowing exactly the way it should.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSecurely anchors the impeller to your outboard’s driveshaft\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eConstructed from long-lasting Stainless Steel for dependable strength\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePrecision-machined to Mercury Marine part specifications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned specifically for cooling-system stability and consistent water flow\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eFits Mercury 3-cylinder \u003c\/span\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003e30–40 horsepower\u003c\/span\u003e\u003c\/strong\u003e\u003cspan data-preserver-spaces=\"true\"\u003e FourStroke outboards\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eFits Mercury 4-cylinder \u003c\/span\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003e40–60 horsepower\u003c\/span\u003e\u003c\/strong\u003e\u003cspan data-preserver-spaces=\"true\"\u003e EFI FourStroke outboards\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eIdeal for a wide range of boats including fishing\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e skiffs, small pontoons, aluminum runabouts, and utility boats\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePerfect for everyday recreational use as well as workboat duty\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhat makes this tiny part so important is how it affects your engine’s cooling rhythm. With a proper impeller key in place, the impeller spins exactly as it should — not slipping, not hesitating, just smooth, steady rotation that sends cooling water through the system with confidence. You’ll notice it when your engine holds a consistent temperature on a long run or when you’re idling through a no-wake zone without a hiccup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eM\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eercury designed this key with tight tolerances, so installation feels natural. It fits firmly without forcing, and once seated, it stays secure even when the conditions get rough. Stainless Steel construction means it resists corrosion whether you’re running in freshwater, brackish estuaries, or saltwater coastlines. T\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ehat’s the kind of durability you appreciate after years of weekend trips and seasonal service intervals.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhy Buy OEM\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhen you rely on your boat as much as most of us do, cutting corners on critical engine parts just isn’t worth it.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e With an authentic Mercury Marine part:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eYou’re getting a component engineered for exact fitment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eLong-term reliability saves money and avoids mid-season breakdowns\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIt works seamlessly with every other Mercury component around it\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eYou avoid the guesswork that comes with aftermarket alternatives\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIt installs right the first time — no reshaping, adjusting, or troubleshooting\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThis is one of those small pieces where genuine parts make a big difference.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFAQ\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ1: Which Mercury engines does the Impeller Key 8M0032831 fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits Mercury 3-cylinder 30–40 horsepower and 4-cylinder 40–60 horsepower EFI FourStroke outboards.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: What makes this different from aftermarket keys?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e The fit is more precise, the Stainless Steel quality is higher, and it’s engineered to match the exact rotation demands of Mercury’s cooling systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I confirm this is the right replacement?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e If your engine falls within the model ranges above, this is the correct key. You can also match it by part number.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Can it be used in saltwater?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Absolutely — the Stainless Steel design resists corrosion in fresh and saltwater.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is installation straightforward?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes. Most boaters install it during a routine impeller service with basic tools.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46940762210595,"sku":"28-8M0032831","price":3.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8M0032831_Main.jpg?v=1760631299","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-key-28-8m0032831","provider":"PartsVu","version":"1.0","type":"link"}