V-Belt – Fits MerCruiser 3.0L Engines (Replaces Mercury 57-862054Q, Volvo 958310/966914, Chrysler 1401622)

V-Belt – Fits MerCruiser 3.0L Engines (Replaces Mercury 57-862054Q, Volvo 958310/966914)

This high-strength V-belt is designed for MerCruiser 3.0L carbureted and MPI engines from 1999 and later. It drives essential accessories like the alternator and water pump, ensuring reliable engine performance.

It serves as a direct replacement for multiple OEM part numbers, including Mercury 57-862054Q, Volvo Penta 958310 and 966914, and Chrysler 1401622.

• Material: Constructed from durable, shock-resistant rubber with reinforcing cords for longevity.
• Dimensions: Features a 39.5-inch (1,003 mm) outside circumference and an approximate width of 0.5 inches (12.7 mm).
• Application: Primarily used on MerCruiser 3.0L engines to drive the alternator and water pump.

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.

Confirm your engine model/year in the table below.

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x V-Belt (57-862054Q)

Installation Guide

1. Safety First: Disconnect the boat's battery before beginning work to prevent accidental startups.
2. Locate the Belt: Identify the existing V-belt on the front of the engine, noting how it is routed around the pulleys.
3. Loosen Tension: Locate the alternator or tensioner pulley. Loosen the mounting bolts just enough to allow the component to move 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, spin each pulley by hand to ensure it turns smoothly and quietly. Clean any grease or debris from the pulley grooves.
6. Route New Belt: Following the path of the old belt, route the new V-belt around the pulleys.
7. Apply Tension: Gently pry the alternator or tensioner back to apply tension to the new belt. A general rule is about half an inch of deflection when pressed firmly.
8. Tighten Bolts: While maintaining tension, tighten the mounting bolts securely.
9. Check Alignment: Ensure the belt is properly seated in the center of each pulley groove.
10. Final Check: Reconnect the battery, start the engine, and observe the belt to ensure it runs smoothly and without noise.

Troubleshooting & FAQ

How do I confirm this belt fits my engine?
The most reliable method is to match the part number. This belt replaces Mercury 57-862054Q, Volvo Penta 958310/966914, and Chrysler 1401622. You can also check the compatible engine models table on this page, but always verify your existing part number first.

What are the signs of a failing V-belt?
Common symptoms include a loud squealing noise from the engine (especially on startup), visible cracks or fraying on the belt surface, and a glazed or shiny appearance in the pulley contact area. A worn belt can also cause charging issues if it fails to turn the alternator properly.

How often should I replace my V-belt?
There is no fixed replacement interval, but regular inspection is key. We recommend checking the belt for signs of wear, cracking, or glazing at least once per season or every 100 hours of operation. Replace it proactively if it shows any signs of deterioration to avoid being stranded by a broken belt.

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.