{"product_id":"sierra-18-15100-serpentine-belt-replaces-mercruiser-57-8638763-for-standard-cooling-engines-13-16-in-x-106-25-in","title":"Sierra Serpentine Belt 18-15100, Replaces 57-8638763, MerCruiser","description":"\u003cp\u003eThe Sierra 18-15100 is a premium aftermarket serpentine belt engineered for MerCruiser applications, built to OEM specifications for correct fit, form, and function. Measuring 106.25 inches in length and 0.69 inches in width, this belt is constructed from high-quality polychloroprene rubber reinforced with polyester fiber tensile members, giving it strong resistance to marine engine oil exposure and stable performance across a wide temperature range. The adjustable serpentine design allows it to drive multiple engine accessories from a single belt path, making it a straightforward replacement for boat owners performing routine maintenance or addressing a worn, cracked, or glazed belt. Each Sierra belt is manufactured to consistent quality standards and is backed by Sierra's industry-leading customer satisfaction warranty, giving buyers confidence that the replacement part will perform as reliably as the original equipment it replaces. This belt is cataloged under Mercury Marine \/ MerCruiser serpentine belt applications and directly interchanges with OEM part number 57-8638763, so it can be ordered with confidence when that number is found stamped on the original belt or listed in engine documentation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-15100\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 106.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 0.69 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polyester, Rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Style:\u003c\/strong\u003e Serpentine, Adjustable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282145347\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Serpentine Belts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine \/ MerCruiser\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e57-8638763\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-15100 serpentine belt fit?\u003c\/strong\u003e The Sierra 18-15100 is cataloged for Mercury Marine \/ MerCruiser engine applications and is designed as a direct-fit replacement serpentine belt for those engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the OEM equivalent to Sierra 18-15100?\u003c\/strong\u003e Sierra 18-15100 directly interchanges with OEM number 57-8638763, so either number can be used to identify the correct replacement belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long and wide is this belt?\u003c\/strong\u003e The Sierra 18-15100 serpentine belt measures 106.25 inches in length and 0.69 inches in width.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-15100 belt made from?\u003c\/strong\u003e It is constructed from polychloroprene rubber reinforced with polyester fiber tensile members, giving it oil resistance and temperature stability for marine engine use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-15100 a genuine Mercury part or aftermarket?\u003c\/strong\u003e The 18-15100 is a Sierra-brand aftermarket belt manufactured to OEM quality standards, not a Mercury-branded original part, but it is built to match the fit, form, and function of the original equipment belt it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-15100 belt weigh?\u003c\/strong\u003e The belt weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-15100 serpentine belt?\u003c\/strong\u003e This belt is white in color.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this belt adjustable?\u003c\/strong\u003e Yes, the 18-15100 is an adjustable serpentine-style belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering the 18-15100?\u003c\/strong\u003e Each order includes one Sierra 18-15100 serpentine belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra offer a warranty on the 18-15100 belt?\u003c\/strong\u003e Yes, the Sierra 18-15100 is covered under Sierra's industry-leading customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with part 18-15100?\u003c\/strong\u003e The Sierra 18-15100 serpentine belt carries UPC 808282145347.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988087943387,"sku":"SIE-18-15100","price":112.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__45293.1753449790.500.750.jpg?v=1785188584","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-15100-serpentine-belt-replaces-mercruiser-57-8638763-for-standard-cooling-engines-13-16-in-x-106-25-in","provider":"Good Vibes Marina","version":"1.0","type":"link"}