{"product_id":"mercury-impeller-47-8m0135803","title":"Mercury – Water Pump Impeller | 15–20hp FourStroke EFI Series | Durable Marine Rubber | 8M0135803","description":"\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury – Water Pump Impeller | 15–20hp FourStroke EFI Series | Durable Marine Rubber | 8M0135803\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOverview\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Anyone who’s spent a few seasons on the water knows how \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eimportant\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e steady cooling is for an outboard. When the impeller is healthy, the engine settles into a calm, confident rhythm — the kind of smooth flow you feel through the helm as much as you hear in the exhaust. The Mercury Marine part 8M0135803 Water Pump Impeller brings that kind of reassurance. It’s a \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003esmall\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e component, sure, but it carries a big responsibility, and you’ll notice the difference it makes when your motor runs cool and steady, even after long hours on the water.\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\"\u003eReplacement water pump impeller for Mercury 15hp and 20hp EFI FourStroke outboards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned for engines with serial numbers 0R833820 and newer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eHigh-flexibility marine-grade elastomer construction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngineered for consistent cooling across wide temperature ranges\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMeets all Mercury Marine OEM durability and performance standards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eBuilt to maintain strong water flow at idle, mid-range, and full throttle\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury 15hp FourStroke EFI\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury 20hp FourStroke EFI\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngines with serial numbers 0R833820 and above (2017 and newer)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIdeal for small fishing boats, jon boats, tenders, utility skiffs, inflatable boats, and compact runabouts\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\"\u003eA dependable impeller is something you feel the moment your engine hits the water. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThis Mercury Marine part keeps the cooling system \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003emoving with a smooth, steady pulse\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e, protecting the powerhead from heat even on long trolling days or slow no-wake zones.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThe elastomer material flexes naturally with temperature changes, so the impeller blades \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ehold\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e their shape and \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ekeep\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e strong flow without \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ewearing down prematurely\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eInstallation is straightforward, with that familiar, precise OEM fitment that slides into place without forcing or guesswork. Once installed, you’ll notice the engine holding temperature more consistently, especially if your previous impeller was starting to fatigue. It’s one of those quiet upgrades that makes the entire experience feel tighter and more secure — whether you’re running a small creek at dawn or pushing across open water with a \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003efull\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e load of gear.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFor owners \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003erunning\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e these compact FourStroke motors, keeping the impeller fresh is one of the best ways to protect your investment and extend \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ethe life of\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e your engine.\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\"\u003eAftermarket impellers can look similar, but they rarely match Mercury’s materials or the exact tolerances these EFI outboards require. An OEM impeller gives you the confidence that cooling flow, blade flex, and internal clearances are exactly what Mercury intended. It lasts longer, fits cleaner, and protects the engine more effectively. When you’re relying on your outboard to get you back every time, OEM isn’t an upgrade — it’s peace of mind.\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 8M0135803 impeller fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits Mercury 15hp and 20hp FourStroke EFI engines with serial numbers 0R833820 and above.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: What makes this different from aftermarket impellers?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e The material quality, exact fitment, and cooling consistency \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eare engineered\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e to Mercury standards, which aftermarket options often can’t match.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How can I confirm this is the right impeller?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Check your engine’s serial number. If it’s 0R833820 or newer on a 15–20hp EFI FourStroke, this is the correct Mercury Marine part.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Is this suitable for saltwater?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes — the impeller is designed for both saltwater and freshwater and holds up well in demanding marine environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is installation manageable for most boat owners?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes. With basic tools and a service manual, most owners can replace it confidently.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46940096266531,"sku":"47-8M0135803","price":24.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/47-8m0135803.jpg?v=1761319649","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-impeller-47-8m0135803","provider":"PartsVu","version":"1.0","type":"link"}