{"product_id":"sierra-marine-v-belt-18-15480","title":"Sierra Marine V-Belt 18-15480 | 48 in. \/ 121.9 cm × 29\/64 in. \/ 11.5 mm","description":"\u003ch2\u003eSierra Marine V-Belt 18-15480\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 18-15480 (Sierra)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Cogged Marine V-Belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffective Length:\u003c\/strong\u003e 48 in. \/ 121.9 cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop Width:\u003c\/strong\u003e 29\/64 in. \/ 11.5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999566614\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe Sierra 18-15480 is a cogged marine V-belt for selected MerCruiser inboard and sterndrive accessory-drive systems. High-strength synthetic cords resist stretching and shock-load failure. The precision-moulded cog profile improves flexibility and allows greater airflow to reduce heat buildup. Rubber sidewalls maintain positive, non-slip pulley contact.\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cp\u003eVerified MerCruiser V8 applications:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMerCruiser 440 TRS — 1983–1986\u003c\/li\u003e\n\u003cli\u003eMerCruiser 450 — 1995–1996\u003c\/li\u003e\n\u003cli\u003eMerCruiser 460 TRS — 1983–1986\u003c\/li\u003e\n\u003cli\u003eMerCruiser 465 \/ 502 CID \/ 8.2L — selected 1990–1992\u003c\/li\u003e\n\u003cli\u003eMerCruiser 502 MAG Bravo \/ 8.2L — selected 1990–1997\u003c\/li\u003e\n\u003cli\u003eMerCruiser 502 MAG EFI \/ 8.2L — selected 1994–1995\u003c\/li\u003e\n\u003cli\u003eMerCruiser 502 MAG MPI \/ 8.2L — selected 1996–1997\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBroader replacement listings also associate this belt with selected 5.0L, 5.7L, 7.4L, and 8.2L MerCruiser V8 accessory-drive configurations. Always confirm engine model, serial number, existing OEM belt number, and pulley arrangement before ordering. Nearby Sierra belts can differ by as little as 1 in. \/ 25.4 mm — matching the OEM part number and belt width is more reliable than selecting by displacement alone.\u003c\/p\u003e\n\n\u003ch2\u003eCross-Reference Part Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSierra:\u003c\/strong\u003e 18-15480\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier\/Catalogue Reference:\u003c\/strong\u003e 47-15480\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMercury \/ MerCruiser:\u003c\/strong\u003e 57-48122\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMercury Quicksilver:\u003c\/strong\u003e 57-48122Q\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMallory:\u003c\/strong\u003e 9-55003\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOMC:\u003c\/strong\u003e 0509295\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGLM:\u003c\/strong\u003e 89440\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen to Replace This Belt\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCracks visible between the cogs\u003c\/li\u003e\n\u003cli\u003eFrayed or worn edges\u003c\/li\u003e\n\u003cli\u003eGlazed, hardened, or oil-contaminated surface\u003c\/li\u003e\n\u003cli\u003eIncreased belt dust around pulleys\u003c\/li\u003e\n\u003cli\u003eSlipping, squealing, or loss of tension\u003c\/li\u003e\n\u003cli\u003eBelt has stretched beyond adjustment range\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInspect pulley grooves for wear, corrosion, and alignment before installing\u003c\/li\u003e\n\u003cli\u003eConfirm correct belt routing for your engine configuration\u003c\/li\u003e\n\u003cli\u003eDo not force the belt over pulley flanges with sharp tools — this can damage internal cords\u003c\/li\u003e\n\u003cli\u003eSet belt tension to the engine manufacturer's specification\u003c\/li\u003e\n\u003cli\u003eRotate the assembly by hand to confirm full pulley seating\u003c\/li\u003e\n\u003cli\u003eRecheck tension after initial operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e This belt is the right choice for pre-season service and routine maintenance on MerCruiser 502 CID \/ 8.2L V8 inboard and sterndrive boats running a conventional V-belt accessory drive. If your engine specifies OEM references 57-48122 or 57-48122Q, this is the direct replacement to have on hand before launch. It also serves as a practical onboard spare — a belt failure on these big-block engines can simultaneously disable raw water cooling and battery charging.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon issue:\u003c\/strong\u003e A 48-inch belt is not automatically the correct fit. Customers frequently order by engine displacement without verifying the pulley arrangement or OEM number, which leads to slipping, overheating, or premature accessory-drive wear. Always match the original OEM belt number and verify the belt width and pulley configuration. If your engine has been converted to a serpentine-belt system, this belt does not apply.\u003c\/p\u003e\n\u003cp\u003eFor a complete cooling system service, pair this belt with a raw water pump impeller. See the \u003ca href=\"\/products\/8131470458916\"\u003ePCM Impeller Kit RP061017\u003c\/a\u003e and \u003ca href=\"\/products\/8131470491684\"\u003ePCM \/ Crusader RP061022 Raw Water Pump Impeller\u003c\/a\u003e for compatible options.\u003c\/p\u003e\n\u003cp\u003eNeed a different belt size? Browse other sizes in the Sierra V-Belt series: \u003ca href=\"\/products\/11077659328548\"\u003eSierra V-Belt 47-15400\u003c\/a\u003e, \u003ca href=\"\/products\/11077659361316\"\u003eSierra V-Belt 47-15410\u003c\/a\u003e, \u003ca href=\"\/products\/11077659426852\"\u003eSierra V-Belt 47-15440\u003c\/a\u003e, \u003ca href=\"\/products\/11077659459620\"\u003eSierra V-Belt 47-15450\u003c\/a\u003e, \u003ca href=\"\/products\/11077659492388\"\u003eSierra V-Belt 47-15455\u003c\/a\u003e, \u003ca href=\"\/products\/11077659557924\"\u003eSierra V-Belt 47-15460\u003c\/a\u003e, \u003ca href=\"\/products\/11077659590692\"\u003eSierra Marine V-Belt 18-15470\u003c\/a\u003e, and \u003ca href=\"\/products\/11077659721764\"\u003eSierra V-Belt 47-15550\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eShop all \u003ca href=\"\/collections\/engine-parts-maintenance\"\u003eEngine Parts \u0026amp; Maintenance\u003c\/a\u003e or browse \u003ca href=\"\/collections\/propulsion-powertrain\"\u003ePropulsion \u0026amp; Powertrain\u003c\/a\u003e for related components.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51037541269540,"sku":"47-15480","price":58.09,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-15128_2dc282f4-7070-4d99-a079-066f7005d666.jpg?v=1783568593","url":"https:\/\/marisolmarine.com\/products\/sierra-marine-v-belt-18-15480","provider":"Marisol Marine Company","version":"1.0","type":"link"}