Mercury MerCruiser Quicksilver Serpentine Belt 865615Q04
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Mercury / MerCruiser Quicksilver Serpentine Belt ā 865615Q04
The Mercury Quicksilver 865615Q04 is a genuine OEM serpentine accessory drive belt used on select MerCruiser sterndrive and inboard engines. This multi-rib belt transfers power from the crankshaft to critical engine accessories such as the alternator, power steering pump, and seawater pump, ensuring reliable engine operation and charging performance.
Key Specifications
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Part Number: 865615Q04 (also listed as 57-865615Q04)
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Type: Multi-rib serpentine belt
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Length: 1,941 mm (ā76.4 in)
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OEM Brand: Mercury Marine / Quicksilver
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Application: Accessory drive belt for MerCruiser engines
Compatible Engines
Commonly used on 2001 and newer MerCruiser V-6 and V-8 sterndrive engines, including:
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4.3L V6
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5.0L V8 (305 CID)
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5.7L V8 (350 CID)
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Some 6.2L V8 applications
Typically installed on Alpha sterndrive engines with standard cooling, often within serial ranges 0M320025 and newer.
Superseded / Cross-Reference Numbers
This belt replaces several earlier MerCruiser part numbers:
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57-8638764
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57-862086
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57-8620861
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57-862086A1
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57-865615004
Common aftermarket equivalent: Sierra 18-15101.
Features
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Genuine Mercury / Quicksilver OEM replacement
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Precision rib design for proper pulley alignment and grip
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Built to withstand high-load marine engine environments
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Direct replacement for the factory-installed belt
ā ļø Fitment Tip:
Always confirm compatibility using your engine model and serial number. MerCruiser engines with similar displacement can use different belt lengths depending on accessory configuration and cooling setup.
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.