Description

Mercury / MerCruiser Quicksilver Serpentine Belt — 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.

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Key Specifications

• Part Number: 865615010 (also referenced as 57-865615010)

• Superseded Number:865615Q10

• Type: Multi-rib serpentine belt

• Length: approx. 2195 mm

• OEM Brand: Mercury Marine / Quicksilver

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Compatible Engines

Commonly used on 2001+ MerCruiser inboard and sterndrive engines, including:

• 5.0L V8 (305 CID)

• 5.7L V8 (350 MAG / 350 MAG MPI)

• 6.2L MPI engines

• MX 6.2L MPI Horizon

Many applications are MIE inboard engines with closed cooling systems and a 4-1/4″ idler pulley configuration.

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Superseded / Cross-Reference Numbers

This belt may also appear under several equivalent numbers:

• 865615Q10 (current Mercury replacement)

• 57-865615010

• 57-86387610

• Aftermarket equivalent: Sierra 18-15122

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Features

• Genuine Mercury / Quicksilver OEM replacement

• Multi-rib design for quiet operation and strong pulley grip

• Built for high-load marine accessory systems

• Direct replacement for factory-installed belts

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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.