Mercury MerCruiser Quicksilver Serpentine Belt 865615010
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Mercury / MerCruiser Quicksilver Serpentine Belt ā 865615010
The Mercury Quicksilver 865615010 is a genuine OEM serpentine accessory drive belt used on a range of MerCruiser small-block V-8 engines. This multi-rib belt transfers power from the crankshaft to key engine components such as the alternator and seawater pump, ensuring reliable charging and cooling performance.
Key Specifications
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Part Number: 865615010 (also referenced as 57-865615010)
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Superseded Number: 865615Q10
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Type: Multi-rib serpentine belt
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Length: approx. 2195 mm
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OEM Brand: Mercury Marine / Quicksilver
Compatible Engines
Commonly used on 2001+ MerCruiser inboard and sterndrive engines, including:
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5.0L V8 (305 CID)
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5.7L V8 (350 MAG / 350 MAG MPI)
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6.2L MPI engines
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MX 6.2L MPI Horizon
Many applications are MIE inboard engines with closed cooling systems and a 4-1/4" idler pulley configuration.
Superseded / Cross-Reference Numbers
This belt may also appear under several equivalent numbers:
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865615Q10 (current Mercury replacement)
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57-865615010
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57-86387610
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Aftermarket equivalent: Sierra 18-15122
Features
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Genuine Mercury / Quicksilver OEM replacement
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Multi-rib design for quiet operation and strong pulley grip
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Built for high-load marine accessory systems
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Direct replacement for factory-installed belts
ā ļø Fitment Tip:
Always confirm compatibility using your engine serial number. MerCruiser engines with the same displacement can use different belt lengths depending on cooling configuration and accessory layout.
Mercury P/N: 865615Q10
Shipping: Ships same or next day for fast Canada wide shipping.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3ā4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us ā and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity ā and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.