{"product_id":"timing-belt-fits-yamaha-25hp-70hp-4-stroke-outboards-replaces-6c5-46241-00","title":"Timing Belt – Fits Yamaha 25HP-70HP 4-Stroke Outboards (Replaces 6C5-46241-00)","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 replacement \u003cstrong\u003eEngine Timing Belt – Fits Yamaha 25HP-70HP 4-Stroke Outboards\u003c\/strong\u003e is designed for a wide range of Yamaha engines from 2005 to 2017. It is compatible with F25, T25, F30, F40, F50, T50, F60, T60, F70, and MURENA EFI 40XSR\/70 models, ensuring reliable performance for maintaining engine timing.\u003c\/p\u003e\n\u003cp\u003eThis belt is a direct replacement for Yamaha part number 6C5-46241-00 (also listed as 6C54624100) and aftermarket equivalent Sierra 18-15130.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstallation Method: Serpentine\u003c\/li\u003e\n\u003cli\u003eManufacturing Standard: ISO9002 Certified\u003c\/li\u003e\n\u003cli\u003eConstruction: Synthetic rubber compound without internal wire reinforcement\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\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6C5-46241-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6C54624100\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-15130\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\u003eThis part is designed for the following Yamaha 4-Stroke models.\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\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF25\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2009–2017\u003c\/td\u003e\n\u003ctd\u003e6C5-46241-00\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eT25\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2009–2017\u003c\/td\u003e\n\u003ctd\u003e6C5-46241-00\u003c\/td\u003e\n\u003ctd\u003eHigh thrust model\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF30\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2013–2017\u003c\/td\u003e\n\u003ctd\u003e6C5-46241-00\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF40\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2008–2017\u003c\/td\u003e\n\u003ctd\u003e6C5-46241-00\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF50\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–2017\u003c\/td\u003e\n\u003ctd\u003e6C5-46241-00\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eT50\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–2010\u003c\/td\u003e\n\u003ctd\u003e6C5-46241-00\u003c\/td\u003e\n\u003ctd\u003eHigh thrust model\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF60\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–2017\u003c\/td\u003e\n\u003ctd\u003e6C5-46241-00\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eT60\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–2017\u003c\/td\u003e\n\u003ctd\u003e6C5-46241-00\u003c\/td\u003e\n\u003ctd\u003eHigh thrust model\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF70\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2010–2017\u003c\/td\u003e\n\u003ctd\u003e6C5-46241-00\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eMURENA EFI 40XSR\/70\u003c\/td\u003e\n\u003ctd\u003e40\/70\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005+\u003c\/td\u003e\n\u003ctd\u003e6C5-46241-00\u003c\/td\u003e\n\u003ctd\u003e\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\u003eEngine Timing Belt\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eSerpentine\u003c\/dd\u003e\n  \u003cdt\u003eNumber of Teeth\u003c\/dt\u003e\n\u003cdd\u003e94\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eSynthetic Rubber Compound\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e1.0 lbs (0.45 kg)\u003c\/dd\u003e\n  \u003cdt\u003eOEM Specifications\u003c\/dt\u003e\n\u003cdd\u003eISO9002 certified manufacturing\u003c\/dd\u003e\n  \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e1-year against manufacturing defects\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eNo internal wire reinforcement\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 Timing Belt (6C5-46241-00)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eEnsure the engine is off and completely cool. Disconnect the battery.\u003c\/li\u003e\n  \u003cli\u003eLoosen the alternator pivot bolt and any tensioner bolts.\u003c\/li\u003e\n  \u003cli\u003eNote the belt's path around the pulleys before removal.\u003c\/li\u003e\n  \u003cli\u003eRelieve tension by swiveling the alternator or tensioner, then slip the old belt off.\u003c\/li\u003e\n  \u003cli\u003eInspect and clean all pulley grooves to ensure they are free of debris, rust, or wear.\u003c\/li\u003e\n  \u003cli\u003eRoute the new belt following the original path, ensuring it is seated in all grooves.\u003c\/li\u003e\n  \u003cli\u003eTension the new belt by swiveling the alternator. Proper tension is about 1 cm (½″) of deflection under moderate thumb pressure on the longest span.\u003c\/li\u003e\n  \u003cli\u003eTighten the adjuster plate bolt first, then the main pivot bolt to factory torque specifications.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery.\u003c\/li\u003e\n  \u003cli\u003eStart the engine and observe the belt to ensure it is tracking correctly and running smoothly.\u003c\/li\u003e\n  \u003cli\u003eShut down the engine and recheck tension, as a new belt may stretch slightly after its initial run.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm this belt fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eVerify your engine's model, horsepower, and year against the \"Engine \u0026amp; Model Compatibility\" table. You should also cross-reference your existing part number with the \"Part Number Matrix\" to ensure it's a match.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are common signs of a worn or failing timing belt?\u003c\/summary\u003e\n  \u003cp\u003eInspect your current belt for signs of wear such as cracking, fraying, glazing (a shiny surface), or missing teeth. You might also hear ticking or high-pitched sounds from the engine bay, which can indicate a problem.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the recommended replacement interval for this belt?\u003c\/summary\u003e\n  \u003cp\u003eWhile a maximum service interval isn't specified, standard marine practice is to inspect the timing belt annually and replace it every 500-1000 operating hours or every 3-5 years, whichever comes first, especially in saltwater environments.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this belt different from the original Yamaha part?\u003c\/summary\u003e\n  \u003cp\u003eThis is an aftermarket part built to meet or exceed OEM specifications using a durable synthetic rubber compound. Unlike some factory belts, it does not feature internal wire reinforcement, but it is manufactured in an ISO 9002 certified facility for quality assurance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I install this timing belt myself?\u003c\/summary\u003e\n  \u003cp\u003eYes, installation is achievable for individuals with good mechanical skills. Please follow the installation steps carefully and ensure the belt is tensioned correctly. If you are unsure, we recommend consulting a professional marine mechanic.\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\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — 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":50619425849659,"sku":"23BL216","price":30.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23BL216_1.png?v=1763032287","url":"https:\/\/seasierra.com\/products\/timing-belt-fits-yamaha-25hp-70hp-4-stroke-outboards-replaces-6c5-46241-00","provider":"SeaSierra","version":"1.0","type":"link"}