{"product_id":"sierra-marine-v-belt-18-15440","title":"Sierra Marine V-Belt 18-15440 | 44 in. \/ 111.8 cm × 29\/64 in. \/ 11.5 mm","description":"\u003csection class=\"product-description\"\u003e\n\n\u003ch2\u003eSierra Marine V-Belt 18-15440 — 44 in. \/ 111.8 cm × 29\/64 in. \/ 11.5 mm\u003c\/h2\u003e\n\n\u003cp\u003eThe Sierra 18-15440 is a cogged marine V-belt designed for the accessory-drive system on select MerCruiser and OMC inboard and sterndrive engines. With an effective length of 44 in. \/ 111.8 cm and a top width of 29\/64 in. \/ 11.5 mm, it drives the alternator and raw water pump on compatible 1975–1977 applications. Built with high-strength synthetic cords, precision-moulded cogs, and positive-grip rubber sidewalls for stable power transfer and long service life in a marine environment.\u003c\/p\u003e\n\n\u003ch2\u003ePart Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number (Sierra):\u003c\/strong\u003e 18-15440\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 47-15440\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOfficial Product Type:\u003c\/strong\u003e Cogged Marine V-Belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999566539\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Accessory Drive (Alternator \/ Raw Water Pump)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffective Length:\u003c\/strong\u003e 44 in. \/ 111.8 cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop Width:\u003c\/strong\u003e 29\/64 in. \/ 11.5 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCross-Reference Part Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMercury \/ MerCruiser:\u003c\/strong\u003e 57-45856, 57-49213A1, 57-93658Q\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOMC:\u003c\/strong\u003e 311046\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMallory:\u003c\/strong\u003e 9-55006\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMerCruiser 233 HP — select 1975–1977 models\u003c\/li\u003e\n\u003cli\u003eMerCruiser 233 MIE — select 1975–1976 models\u003c\/li\u003e\n\u003cli\u003eAdditional MerCruiser accessory-drive configurations using a 44 in. belt with a 5.5 in. \/ 139.7 mm water-pump pulley\u003c\/li\u003e\n\u003cli\u003eOMC applications cross-referencing part number 311046\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitment Note:\u003c\/strong\u003e Before ordering, confirm your engine model, serial number, existing OEM belt number, water-pump pulley diameter, and required belt length. Similar MerCruiser engines may use 46 in., 47 in., or other belt lengths depending on pulley and accessory configuration. When in doubt, measure the belt you are replacing.\u003c\/p\u003e\n\n\u003ch2\u003eService Interval\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInspect at every spring commissioning and 100-hour service\u003c\/li\u003e\n\u003cli\u003eReplace when cracks appear between cogs, edges fray, belt glazes or hardens, or when squealing and slippage develop\u003c\/li\u003e\n\u003cli\u003eReplace immediately if oil or coolant contamination is present on the belt\u003c\/li\u003e\n\u003cli\u003eKeeping a spare belt onboard is recommended for longer passages\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInspect pulley grooves for wear or corrosion before installation\u003c\/li\u003e\n\u003cli\u003eConfirm correct belt routing and alternator\/water-pump alignment\u003c\/li\u003e\n\u003cli\u003eSet tension to engine manufacturer’s specification — do not over-tension\u003c\/li\u003e\n\u003cli\u003eDo not force the belt over pulley flanges with sharp tools\u003c\/li\u003e\n\u003cli\u003eRotate the drive through one full revolution after installation to confirm proper seating in every pulley\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest Use:\u003c\/strong\u003e The 18-15440 is most commonly needed during spring commissioning or pre-season service on mid-1970s MerCruiser 233 HP and 233 MIE sterndrives. If the existing belt shows any cracking, glazing, or age-related hardening, replace it before the season starts — a broken accessory belt will take out both your charging system and raw water cooling simultaneously.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Issues:\u003c\/strong\u003e The most frequent fitment error with this belt is confusing it with the 46 in. or 47 in. versions used on other MerCruiser configurations. Always verify pulley diameter (5.5 in. \/ 139.7 mm for this application) and cross-reference with OEM number 57-49213A1 to confirm you have the right length before installation.\u003c\/p\u003e\n\n\u003ch2\u003eRelated Parts\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/marisolmarine.com\/products\/sierra-marine-v-belt-18-15470\"\u003eSierra Marine V-Belt 18-15470 — 47 in. \/ 119.4 cm\u003c\/a\u003e — next size up in the same cogged belt series\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/marisolmarine.com\/products\/sierra-marine-v-belt-18-15480\"\u003eSierra Marine V-Belt 18-15480 — 48 in. \/ 121.9 cm\u003c\/a\u003e — 48-inch variant for other MerCruiser configurations\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/marisolmarine.com\/products\/sierra-v-belt-47-15400\"\u003eSierra V-Belt 47-15400\u003c\/a\u003e — shorter belt in the same accessory-drive series\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/marisolmarine.com\/products\/sierra-v-belt-47-15455\"\u003eSierra V-Belt 47-15455\u003c\/a\u003e — 44.5 in. intermediate size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/marisolmarine.com\/products\/sierra-v-belt-47-15450\"\u003eSierra V-Belt 47-15450\u003c\/a\u003e — 45 in. variant\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51037541072932,"sku":"47-15440","price":64.19,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-15128_04b4b8a0-b28c-490e-8b05-9da7cf48b53b.jpg?v=1783568588","url":"https:\/\/marisolmarine.com\/products\/sierra-marine-v-belt-18-15440","provider":"Marisol Marine Company","version":"1.0","type":"link"}