{"product_id":"serpentine-belt-18-15116-for-mercruiser-4-3l-alpha-rwc-1996-1999-262-cid-v6","title":"Sierra 18-15116 Serpentine Belt, Replaces 57-861758\/57-861758Q, Fits Mercruiser 4.3L Alpha 1996-99","description":"\u003cp\u003eThe Sierra 18-15116 is a serpentine belt engineered for Mercruiser 4.3L Alpha sterndrive engines built in the 1996-99 model years within the OF803000-OL618999 serial number range (foothole positions 2 and 6). It is constructed from polychloroprene rubber and polyester fiber tensile members, giving the belt the tensile strength and flexibility needed to drive engine accessories under continuous marine duty. The belt is built with oil resistance and temperature stability standard, so it holds up against the heat cycling, oil exposure, and vibration typical of an inboard\/outboard engine compartment.\u003c\/p\u003e\u003cp\u003eThis belt measures 13\/16 inch wide and 86.75 inches long, matching the OEM Mercruiser dimensions for this application. It is manufactured to be correct in fit, form, and function as a direct replacement for the original equipment belt, cross-referencing to Mercruiser part numbers 57-861758 and 57-861758Q. Boat owners and marine technicians use it as a routine maintenance replacement when an aging serpentine belt shows cracking, glazing, or stretch, or as a preventive swap during scheduled engine service.\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 18-15116\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Style:\u003c\/strong\u003e Serpentine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 13\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 86.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polyester, Rubber\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 0.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282145507\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 57-861758, 57-861758Q\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser 4.3L Alpha, 1996-99, serial number range OF803000-OL618999, foothole positions 2 and 6\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e57-861758\u003c\/li\u003e\n\u003cli\u003e57-861758Q\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-15116 serpentine belt fit?\u003c\/strong\u003e This belt fits Mercruiser 4.3L Alpha sterndrive engines built in the 1996-99 model years, specifically within the serial number range OF803000-OL618999, at foothole positions 2 and 6.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the OEM cross-reference numbers for this belt?\u003c\/strong\u003e Sierra 18-15116 replaces Mercruiser part numbers 57-861758 and 57-861758Q, so either OEM number can be used to confirm the correct match.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the 18-15116 serpentine belt?\u003c\/strong\u003e It measures 13\/16 inch in width and 86.75 inches in length.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the belt made from?\u003c\/strong\u003e The 18-15116 belt is made of polychloroprene rubber with polyester fiber tensile members, giving it oil resistance and temperature stability for marine engine use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Mercruiser part or an aftermarket replacement?\u003c\/strong\u003e The 18-15116 is a Sierra aftermarket belt manufactured to be OEM quality and correct in fit, form, and function as a replacement for Mercruiser 57-861758 and 57-861758Q.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-15116 belt weigh?\u003c\/strong\u003e It weighs 0.5 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-15116 belt?\u003c\/strong\u003e It is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill I need any special tools to install this belt?\u003c\/strong\u003e The 18-15116 is a standard serpentine belt for a Mercruiser 4.3L Alpha engine, and installation follows the same belt routing and tensioner release procedure as the original equipment belt it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the foothole position matter when ordering this belt?\u003c\/strong\u003e Yes, the 18-15116 is specified for foothole positions 2 and 6 on the Mercruiser 4.3L Alpha, 1996-99, serial range OF803000-OL618999, so confirming the foothole position helps ensure correct fitment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e You receive one Sierra 18-15116 serpentine belt.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988088172763,"sku":"SIE-18-15116","price":78.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-15116__72317.1737843211.500.750.jpg?v=1785188967","url":"https:\/\/www.goodvibesmarina.com\/products\/serpentine-belt-18-15116-for-mercruiser-4-3l-alpha-rwc-1996-1999-262-cid-v6","provider":"Good Vibes Marina","version":"1.0","type":"link"}