V-Belt – Fits MerCruiser 120, 140, 2.5L, 3.0L Engines (Replaces 57-65607Q)

V-Belt – Fits MerCruiser 120, 140, 2.5L, 3.0L Engines (Replaces 57-65607Q)

This V-belt is designed for Mercury MerCruiser 120-140 HP, 2.5L-3.0L 4-cylinder engines from 1974–2008. It functions as the power steering belt on various MerCruiser stern drive models, ensuring reliable steering performance.

This part is a direct replacement for the following OEM and aftermarket part numbers: Mercury/MerCruiser 57-65607Q, 57-65607, 57-65607T; Sierra 18-15370; and FridayParts 18-15370.

• Application: Designed specifically for power steering systems.
• Dimensions: Measures 37 inches (940 mm) in length.
• Material: Constructed from a durable rubber and fiber composite for longevity.

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 V-Belt (57-65607Q)

Installation Guide

1. Safety First: Ensure the engine is completely off and cool to the touch. Disconnect the boat's battery.
2. Locate the Belt: Identify the power steering belt routed around the engine pulleys and the power steering pump.
3. Release Tension: Loosen the mounting bolts on the power steering pump or the tensioner pulley to create slack in the belt.
4. Remove Old Belt: Carefully slide the old V-belt off the pulleys. Note its path.
5. Install New Belt: Route the new belt onto the pulleys, following the same path as the old one.
6. Apply Tension: Gently pry the power steering pump or adjust the tensioner to apply proper tension to the belt. A good rule of thumb is about half an inch of flex.
7. Tighten Bolts: Securely tighten the mounting bolts you loosened earlier to lock the pump/tensioner in place.
8. Final Check: Reconnect the battery, start the engine, and observe the belt to ensure it runs smoothly without squealing or wobbling.

Troubleshooting & FAQ

Q: How do I confirm this belt fits my engine?
A: First, review the "Compatible Engine Models" table on this page to ensure your MerCruiser model and year are listed. Second, cross-reference the part number (57-65607Q) with your existing belt or service manual to guarantee a match.

Q: What are the common signs my V-belt needs to be replaced?
A: Telltale signs of a failing belt include loud squealing noises during startup or operation, visible cracks or fraying on the belt's surface, and diminished power steering performance.

Q: Is this belt for the alternator or the power steering pump?
A: This V-belt is specifically designed for the power steering pump on the MerCruiser engines listed. Your engine may use a different belt for the alternator/water pump.

Q: How often should I replace my power steering belt?
A: We recommend visually inspecting the belt during regular maintenance or at least once a year. For preventative care, replacing the belt every 3-5 years is a good practice, depending on usage and conditions.

Q: OEM vs. Aftermarket?
A: 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.

Q: How fast do you ship and how much does it cost?
A: 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.

Q: What is your warranty and return policy?
A: 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.