{"product_id":"807757t-18-6457-serpentine-belt-idler-pulley-for-mercruiser","title":"807757T 18-6457 Serpentine Belt Idler Pulley for MerCruiser","description":"\u003cstrong\u003eThis Serpentine Belt Idler Pulley is a replacement idler pulley compatible with MerCruiser engines and matches OEM Part# 807757T and 18-6457.\u003c\/strong\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThis serpentine belt idler pulley provides smooth, reliable tension for the drive belt system on MerCruiser marine engines. Designed to reduce vibration and extend belt life, it is a direct replacement for worn or failing pulleys. Marine mechanics and boat owners use this idler pulley to restore proper belt operation in stern drive and inboard applications.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePrecision-engineered to match OEM specifications for MerCruiser serpentine belt systems\u003c\/li\u003e\n\u003cli\u003eDurable sealed bearing reduces friction and resists moisture contamination\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant coating protects against marine environment exposure\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on installation with no modifications required\u003c\/li\u003e\n\u003cli\u003eReplaces OEM part numbers 807757T and 18-6457 for exact fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Uses\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eReplace worn or noisy idler pulleys on MerCruiser 4.3L, 5.0L, and 5.7L engines\u003c\/li\u003e\n\u003cli\u003eUsed in marine stern drive and inboard belt drive systems\u003c\/li\u003e\n\u003cli\u003eSuitable for both saltwater and freshwater boat applications\u003c\/li\u003e\n\u003cli\u003eMaintenance replacement during water pump or alternator service\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number(s):\u003c\/strong\u003e 807757T, 18-6457\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Serpentine belt idler pulley\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing Type:\u003c\/strong\u003e Sealed ball bearing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel with corrosion-resistant coating\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Will this pulley fit my MerCruiser 4.3L engine?\u003cstrong\u003e A:\u003c\/strong\u003e This idler pulley is compatible with many MerCruiser V6 and V8 engines that use OEM part 807757T, but verify your engine’s part number before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is the pulley pre-lubricated and ready to install?\u003cstrong\u003e A:\u003c\/strong\u003e Yes, the sealed bearing comes fully lubricated and requires no additional grease for installation.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProduct appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"DURAFORCE","offers":[{"title":"Default Title","offer_id":53676815581457,"sku":"ZZ2Y01547","price":73.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/2446\/2929\/files\/57_1d52791d-a056-42a3-993b-43fd9e107b94.jpg?v=1781578699","url":"https:\/\/www.duraforce.com\/products\/807757t-18-6457-serpentine-belt-idler-pulley-for-mercruiser","provider":"DURAFORCE","version":"1.0","type":"link"}