{"product_id":"pulley-idler-864625t","title":"Quicksilver – Idler Pulley | MerCruiser V6 \u0026 V8 Series | 6-Groove Pulley Design | 864625T","description":"\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQuicksilver – Idler Pulley | MerCruiser V6 \u0026amp; V8 Series | 6-Groove Pulley Design | 864625T\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 Every boater knows the importance of a quiet, well-behaved serpentine belt system. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhen the belt tracks straight, tensions properly, and runs over \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003esmooth\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e pulleys, the whole engine feels calmer.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e But when an idler pulley starts to go, you hear it — that faint chirp, that slight vibration, that little reminder that it’s time for fresh hardware. This Mercury Marine part replaces that uncertainty with confidence. It’s a simple component, but one that keeps everything else moving the right way.\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 idler pulley for MerCruiser V6 and V8 engines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSix-groove, 4.25-inch diameter design\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eBuilt for engines using serpentine belt systems\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMarine-grade materials for long-term durability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury Marine part number 864625T\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\"\u003eFits MerCruiser V6 and V8 engines from 1998 and newer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCompatible with 305, 350, and 377 cubic inch platforms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFound on cruisers, sport boats, runabouts, bowriders, and many family performance boats\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned for both freshwater and coastal operation\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\"\u003eYou’ll feel the difference this pulley makes the moment the engine starts. The belt glides over it with a smooth, centered motion, eliminating the chatter or wobble caused by a worn or aging pulley. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThat tight tracking improves the performance of everything the belt drives\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e — \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ealternator, water pump, power steering, and more.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThe pulley rotates cleanly on its bearing, producing a steady, controlled feel that helps reduce belt wear and engine vibration. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThe grooves are machined precisely to match MerCruiser belt profiles, \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eso alignment is\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e crisp and predictable.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThis level of accuracy \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ematters\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e at higher RPMs, where even slight misalignment can \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ecause\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e heat, noise, or premature bearing wear.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eInstallation is straightforward using \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ecommon\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e tools. Once installed, the pulley gives you that small but meaningful feeling of mechanical confidence — the sense that your belt system is back to factory-smooth operation.\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 pulleys often \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003emiss\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e the groove spacing, bearing quality, or material hardness \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003erequired\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e for marine applications.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e A pulley that works fine on paper can fail quickly under the heat and vibration of a real engine compartment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eA genuine Mercury Marine part avoids those problems entirely. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIt’s engineered\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e for the exact load, speed, and environment your engine operates \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ein\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It lasts longer, spins truer, and protects your belt and accessories from unnecessary wea\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003er. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIt’s the kind of part seasoned boaters choose because it saves time, money, and frustration.\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 engines does this idler pulley fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits MerCruiser V6 and V8 engines from 1998 and newer using serpentine belt systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: How is this different from aftermarket pulleys?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Precision groove alignment, higher bearing quality, and marine-rated construction.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I confirm it’s the correct pulley?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCheck your engine manual — if it \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ecalls for\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e a six-groove, 4.25-inch pulley and lists part 864625T, this is correct.\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 Yes — the materials are built for both environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is installation simple?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Most boaters can install it with basic hand tools.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46935747821859,"sku":"864625T","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/864625T_MAIN-1.jpg?v=1760631265","url":"https:\/\/partsvu.com\/en-ca\/products\/pulley-idler-864625t","provider":"PartsVu","version":"1.0","type":"link"}