Power Steering Pump Pulley – Fits MerCruiser 4.3L-8.2L (1996-2014) (Replaces 861578, 8M0150723)

Power Steering Pump Pulley – Fits MerCruiser 4.3L-8.2L (1996-2014)

This power steering pump pulley is a direct replacement for MerCruiser sterndrive engines manufactured between 1996 and 2014. It is engineered for use with serpentine belt systems and fits a wide range of models, including 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, and 8.2L engines.

This component replaces MerCruiser OEM part numbers 861578 and 8M0150723, as well as aftermarket parts Sierra 18-8297, 875168, and 807731T.

• Engineered for serpentine belt systems.
• Features a 5-3/4 inch overall diameter.
• Directly replaces OEM parts for reliable fitment and function.

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.

Technical Specifications

Package Contents

• 1 x Power Steering Pump Pulley (Replaces 8M0150723/861578)

Explosion Diagram

Installation Guide

1. Safety First: Disconnect the boat's battery to prevent accidental starts.
2. Relieve Belt Tension: Use a suitable breaker bar or ratchet on the belt tensioner to loosen the serpentine belt, then slide it off the power steering pump pulley.
3. Remove Old Pulley: Attach a power steering pump pulley remover tool to the pulley hub. Hold the tool's body steady and turn the center screw to pull the pulley off the pump shaft.
4. Inspect Shaft: Clean and inspect the power steering pump shaft for any scoring, rust, or damage that could affect the new pulley's fit.
5. Install New Pulley: Position the new pulley on the shaft. Use a pulley installer tool to press it on smoothly until it is fully seated and aligned with other pulleys. Do not hammer the pulley onto the shaft.
6. Reinstall Belt: Route the serpentine belt according to your engine's diagram and release the tensioner to secure it.
7. Final Checks: Reconnect the battery. Start the engine and listen for unusual noises. Check for proper belt tracking and steering function.

Troubleshooting & FAQ

How do I confirm this pulley fits my engine?
First, check the "Compatible Engine Models" table on this page to see if your MerCruiser model and year range are listed. Next, verify that your current part number matches one of the numbers in our "Part Number Cross-Reference" table, such as 861578 or 8M0150723. Visually comparing the new pulley to your old one is also a crucial final step.

What are common signs that my power steering pump pulley is failing?
Symptoms include a persistent high-pitched squealing or chirping sound from the engine bay, visible wobbling of the pulley while the engine is running, cracks or chips on the pulley surface, and premature wear or damage to the serpentine belt.

Do I need special tools to replace this pulley?
Yes, a dedicated power steering pump pulley remover and installer tool kit is required for this job. Using improper tools, such as a hammer or a standard gear puller, can damage the new pulley, the power steering pump, or both.

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.