{"product_id":"serpentine-alternator-drive-belt-fits-mercruiser-5-0l-5-7l-6-2l-v8-replaces-57-865615q10","title":"Serpentine Alternator Drive Belt – Fits MerCruiser 5.0L, 5.7L, 6.2L V8 (Replaces 57-865615Q10)","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis is a high-quality aftermarket \u003cstrong\u003eSerpentine Alternator Drive Belt – Fits MerCruiser 5.0L, 5.7L, 6.2L V8 Engines (Replaces 57-865615Q10)\u003c\/strong\u003e. It is designed for reliable performance in Mercury MerCruiser 5.0L, 5.7L, and 6.2L V8 engines, including standard and MPI Horizon models manufactured between 2001 and 2008.\u003c\/p\u003e\n\u003cp\u003eThis belt is a direct replacement for Mercury part numbers 57-865615Q10, 57-865615010, 865615010, and 865615Q10.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDrives the engine alternator and water pump.\u003c\/li\u003e\n\u003cli\u003eConstructed from durable, reinforced rubber to resist wear and heat.\u003c\/li\u003e\n\u003cli\u003eEngineered to meet or exceed OEM specifications for fit and function.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e57-865615Q10\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e57-865615010\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e865615010\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e865615Q10\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eFor MerCruiser Engines: This belt fits specific V8 models listed below. Always verify your engine's model and serial number range to ensure correct fitment.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.7L MPI Horizon MIE\u003c\/td\u003e\n        \u003ctd\u003e350\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2008\u003c\/td\u003e\n        \u003ctd\u003e57-865615Q10\u003c\/td\u003e\n        \u003ctd\u003e2195 mm belt\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.7L MPI MIE (FWC)\u003c\/td\u003e\n        \u003ctd\u003e350\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2008\u003c\/td\u003e\n        \u003ctd\u003e57-865615Q10\u003c\/td\u003e\n        \u003ctd\u003e2195 mm belt\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003eMX 6.2L MPI MIE\u003c\/td\u003e\n        \u003ctd\u003e377\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002–2007\u003c\/td\u003e\n        \u003ctd\u003e57-865615Q10\u003c\/td\u003e\n        \u003ctd\u003e2195 mm belt\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003eMX 6.2L MPI Horizon MIE\u003c\/td\u003e\n        \u003ctd\u003e377\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002–2008\u003c\/td\u003e\n        \u003ctd\u003e57-865615Q10\u003c\/td\u003e\n        \u003ctd\u003e2195 mm belt\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e350 Mag MPI Horizon MIE\u003c\/td\u003e\n        \u003ctd\u003e350\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002–2007\u003c\/td\u003e\n        \u003ctd\u003e57-865615Q10\u003c\/td\u003e\n        \u003ctd\u003e2195 mm belt\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e350 Mag MPI MIE\u003c\/td\u003e\n        \u003ctd\u003e350\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2002–2007\u003c\/td\u003e\n        \u003ctd\u003e57-865615Q10\u003c\/td\u003e\n        \u003ctd\u003e2195 mm belt\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e377 MPI MIE\u003c\/td\u003e\n        \u003ctd\u003e377\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2008\u003c\/td\u003e\n        \u003ctd\u003e57-865615Q10\u003c\/td\u003e\n        \u003ctd\u003e2195 mm belt\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eSerpentine Belt\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eEngine Accessory Drive\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eReinforced Rubber\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e2195 mm (length)\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eDrives alternator and water pump\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Serpentine Belt (57-865615Q10)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the negative battery terminal to prevent accidental starts.\u003c\/li\u003e\n  \u003cli\u003eLocate the serpentine belt and the automatic tensioner pulley.\u003c\/li\u003e\n  \u003cli\u003eUse a suitable wrench or belt tensioner tool to rotate the tensioner, releasing pressure on the belt.\u003c\/li\u003e\n  \u003cli\u003eCarefully slip the old belt off the pulleys. Note the routing path before removal.\u003c\/li\u003e\n  \u003cli\u003eCompare the old belt with the new one to ensure they are the same length.\u003c\/li\u003e\n  \u003cli\u003eRoute the new belt around the pulleys according to your engine's diagram. It is often easiest to leave a smooth, non-grooved pulley for last.\u003c\/li\u003e\n  \u003cli\u003eRelease the tensioner to apply pressure to the new belt.\u003c\/li\u003e\n  \u003cli\u003eDouble-check that the belt is correctly seated in all pulley grooves.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery terminal and start the engine to check for proper operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow can I confirm this belt fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eThe surest way is to match your original part number to one of the cross-references listed in our Part Number Matrix. You can also review the Engine \u0026amp; Model Compatibility table, but always verify against your specific engine model and year.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failing serpentine belt?\u003c\/summary\u003e\n  \u003cp\u003eCommon signs include squealing or chirping noises from the engine bay, visible cracks or fraying on the belt, and accessories like the alternator or water pump failing to operate correctly, which may cause overheating or battery issues.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should this serpentine belt be replaced?\u003c\/summary\u003e\n  \u003cp\u003eWhile there is no fixed interval, it is best to inspect the belt during regular engine maintenance. Replacement is typically recommended every 500-1000 hours of operation, or if signs of wear like glazing, cracking, or fraying are visible.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I install this belt myself?\u003c\/summary\u003e\n  \u003cp\u003eIf you have experience with marine engine maintenance and the correct tools (like a tensioner wrench), installation is straightforward. However, due to the importance of correct routing and tension, we recommend professional installation for safety and optimal performance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003ePro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003eFast Global Fulfillment — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003eManufacturer-Direct Value — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723978543419,"sku":"23BL343","price":35.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23BL343_1.jpg?v=1763039128","url":"https:\/\/seasierra.com\/products\/serpentine-alternator-drive-belt-fits-mercruiser-5-0l-5-7l-6-2l-v8-replaces-57-865615q10","provider":"SeaSierra","version":"1.0","type":"link"}