Mercury MerCruiser Quicksilver Serpentine Belt 865615Q07
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Mercury / MerCruiser Quicksilver Serpentine Belt ā 865615Q07
The Mercury Quicksilver 865615Q07 is a genuine OEM serpentine accessory drive belt used on select MerCruiser big-block inboard and sterndrive engines. This multi-rib belt transfers power from the crankshaft to engine accessories such as the alternator and seawater pump, ensuring proper charging and cooling system operation.
Key Specifications
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Part Number: 865615Q07 (also listed as 57-865615Q07)
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Type: Multi-rib serpentine belt
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Length: approx. 2467 mm (96.75 in)
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OEM Brand: Mercury Marine / Quicksilver
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Application: Accessory drive belt for MerCruiser big-block engines
Compatible Engines
Commonly used on late-1990s to early-2000s MerCruiser V8 engines, including:
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454 MAG MPI
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454 MAG MPI Horizon (Gen VI)
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7.4L MPI engines
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502 MAG MPI
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8.2L MPI MIE
Many applications fall within serial ranges from approximately 1998ā2001 big-block MerCruiser engines.
Superseded / Cross-Reference Numbers
This belt may also appear under several earlier part numbers:
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57-861050
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57-8638767
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57-865615007
Aftermarket equivalent: Sierra 18-15103.
Features
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Genuine Mercury / Quicksilver OEM replacement
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Engineered for proper rib alignment and pulley grip
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Designed for high-load marine engine environments
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Maintains reliable operation of critical accessories
ā ļø Fitment Tip:
Always verify compatibility using the engine serial number. Many MerCruiser engines with similar displacement can use different belt lengths depending on accessory configuration.
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.