57-65607Q Power Steering Pump Belt for MerCruiser | JLM Marine

Power Steering Pump Belt – Fits MerCruiser 2.5L, 3.0L, 3.0LX & 3.0L MPI Engines

This power steering pump belt (OEM 57-65607Q) is designed for MerCruiser inline 4-cylinder engines, including the 2.5L (153ci), 3.0L (181ci), 3.0LX, and 3.0L MPI models spanning 1979 through current production. It provides reliable power transfer to your steering pump, ensuring smooth, responsive handling on the water.

This belt directly replaces Mercury Marine OEM part numbers 57-65607Q, 57-65607, and 57-65607T. It is engineered to meet OEM specifications for fit, durability, and performance across a wide range of MerCruiser sterndrive applications.

• Aftermarket replacement belt built to OEM dimensional and material standards
• Compatible with GM 153ci and 181ci inline 4-cylinder MerCruiser engines
• Ensures consistent power steering pump operation for safe, reliable boat handling

Part Number Cross-Reference

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

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 × Power Steering Pump Belt (57-65607Q)

Installation Guide

1. Disconnect the battery negative terminal to prevent accidental engagement of electrical systems.
2. Locate the power steering pump and identify the existing belt routing path around the pump pulley and crankshaft.
3. Loosen the power steering pump mounting bolts to release tension on the old belt. Do not fully remove the bolts.
4. Slide the old belt off the pulleys and inspect the pulleys for wear, cracks, or debris; clean if necessary.
5. Route the new belt around the crankshaft pulley and power steering pump pulley following the original path.
6. Apply gentle tension by levering the pump away from the engine block until the belt is snug but not over-tight.
7. Tighten the power steering pump mounting bolts to the manufacturer's specified torque.
8. Check belt tension by pressing midway between pulleys; deflection should be approximately ½ inch under moderate thumb pressure.
9. Reconnect the battery negative terminal and start the engine to verify proper belt operation and alignment.
10. Inspect for unusual noise, vibration, or slippage; adjust tension if needed. Re-torque bolts after initial run-in.
11. Check belt condition and tension during regular maintenance intervals or if steering effort increases.

Troubleshooting & FAQ

Q: How do I confirm this belt fits my MerCruiser engine?
A: Cross-reference your engine model and serial number with the compatibility table above. You can find your serial number on the engine's ID tag, typically on the flame arrestor or valve cover. Use the Mercury Serial Number Guide or Mercury Parts Catalog linked above to verify your model year and part number.

Q: What are the symptoms of a failing power steering pump belt?
A: Common signs include squealing or chirping noises during engine startup or steering, increased steering effort (especially at low RPM or idle), visible cracks or glazing on the belt surface, and fraying edges. If you notice any of these, inspect and replace the belt promptly to avoid steering failure.

Q: How often should I replace the power steering pump belt?
A: Inspect the belt at every seasonal maintenance or every 100 hours of operation. Replace it every 2–3 years or sooner if you observe cracking, glazing, fraying, or loss of tension. Belts exposed to saltwater or high heat may require more frequent replacement.

Q: Can I adjust the belt tension myself, or do I need a professional?
A: Belt tensioning is straightforward: loosen the pump mounting bolts, lever the pump to apply tension, then re-torque the bolts. However, incorrect tension can cause premature wear or pump damage. If you're unfamiliar with the procedure, professional installation is recommended.

Q: Will this belt work on Sea Ray boats with MerCruiser 3.0L engines?
A: Yes, Sea Ray boats equipped with MerCruiser 3.0L, 3.0LX, or 3.0L MPI engines use this same belt (57-65607Q). Verify your engine serial number falls within the ranges listed in the compatibility table.

Q: Is this an OEM belt or an aftermarket replacement?
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.