Mercury MerCruiser Quicksilver Serpentine Belt 865615Q03
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Mercury / MerCruiser Quicksilver Serpentine Belt ā 865615Q03
The Mercury Quicksilver 865615Q03 is a genuine OEM serpentine accessory drive belt used on many MerCruiser sterndrive and inboard engines. This multi-rib belt transfers power from the crankshaft to engine accessories such as the alternator, seawater pump, and power steering pump, helping maintain proper engine charging and cooling performance.
Key Specifications
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Part Number: 865615Q03 (also referenced as 57-865615Q03)
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Type: Multi-rib serpentine belt
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Length: 2,704 mm (ā106.5 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 2001ā2016 MerCruiser V-6 and V-8 engines, including:
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4.3L V6 MPI
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5.0L V8 (305 CID)
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5.7L V8 (350 CID)
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377 CID engines
Typical configurations include:
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Alpha drives with closed cooling systems
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Bravo drives with standard cooling systems
Applicable serial ranges commonly fall between:
0M320025 ā 2A455872 (varies by configuration).
Superseded / Cross-Reference Numbers
This belt may replace earlier Mercury part numbers such as:
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57-8638763
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57-862807
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57-862087A1
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57-865615-003
Aftermarket equivalent: Sierra 18-15100.
Features
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Genuine Mercury / Quicksilver OEM replacement
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Precision rib design for proper pulley grip and quiet operation
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Designed for high-load marine environments
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Direct replacement for factory-installed belt
ā ļø Fitment Tip:
Always verify compatibility using the engine serial number. MerCruiser engines with the same displacement can use different belt lengths depending on cooling system configuration and accessory layout.
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.