Serpentine Belt - Fits MerCruiser V8 5.0L, 5.7L, 6.2L, 7.4L Engines (Replaces 865615Q06, 57-865615Q06)

Serpentine Belt – Fits MerCruiser V8 5.0L, 5.7L, 6.2L, 7.4L & 8.2L Engines (Replaces 865615Q06)

This serpentine belt is designed for a range of MerCruiser V8 Sterndrive and Inboard engines, specifically 5.0L, 5.7L, 6.2L, 7.4L, and 8.2L models from approximately 1998 to 2004. It is engineered for configurations with a high-mount alternator, power steering, and a closed cooling system.

This belt is a direct replacement for MerCruiser part numbers 865615Q06, 57-865615Q06, 865615006, 57-865615006, 8638766, 57-8638766, 8610491, 57-8610491, and Sierra 18-15102.

• Engineered to meet or exceed OEM specifications for fit and performance.
• Constructed from a durable, high-grade rubber compound for longevity.
• Application: Primary engine belt drive system.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

1 x Serpentine Belt (865615Q06)

Installation Guide

Professional installation is recommended. The general steps are as follows:

1. Safety First: Ensure the engine is off and cool, and disconnect the battery.
2. Locate the Belt: Identify the serpentine belt and its routing path around the pulleys. It's helpful to draw a diagram or take a photo of the current belt's path.
3. Release Tension: Use a breaker bar or serpentine belt tool to rotate the automatic tensioner pulley and release tension on the belt.
4. Remove Old Belt: Carefully slip the old belt off the pulleys.
5. Inspect Pulleys: Before installing the new belt, check all pulleys for wear, damage, or wobble. Clean them if necessary.
6. Install New Belt: Route the new belt according to your diagram, starting with the crankshaft pulley and leaving the tensioner or an easy-to-access smooth pulley for last.
7. Apply Tension: Slowly release the automatic tensioner to apply tension to the new belt. Ensure the belt is properly seated in all pulley grooves.
8. Final Check: Reconnect the battery, start the engine, and observe the belt for a few minutes to ensure it is running smoothly and quietly.

Troubleshooting & FAQ

How do I confirm this belt fits my engine?

This belt is designed for specific MerCruiser V8 models from 2002-2004 (5.0L, 5.7L, 6.2L) and 1998-2001 (7.4L, 8.2L) with certain configurations. Please review the "Compatible Engine Models" table and check your engine's serial number and setup (e.g., high mount alternator, power steering) against the notes provided. Cross-referencing your old belt's part number with our "Part Number Cross-Reference" table is the best way to guarantee a match.

What are the signs of a failing serpentine belt?

Common signs include visible cracks, fraying, or missing ribs on the belt. You may also hear squealing or chirping sounds from the engine bay, particularly during startup or when the engine is under load. Other symptoms can be an overheating engine or a loss of power steering, as the belt drives these critical components.

How often should I replace my serpentine belt?

As a general guideline, serpentine belts should be inspected regularly and replaced every 3 to 5 years or after a specific number of service hours, as recommended by your engine manufacturer. Environmental factors like heat and saltwater exposure can accelerate wear.

OEM vs. Aftermarket?

This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

How fast do you ship and how much does it cost?

We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

What is your warranty and return policy?

This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.