3888323 Power Steering Pump for MerCruiser OMC Volvo Penta | JLM Marine

3888323 Power Steering Pump for MerCruiser, OMC & Volvo Penta Engines

This aftermarket power steering pump is designed to fit most MerCruiser, OMC, and Volvo Penta 4-cylinder engines, as well as 4.3L V6, 5.0L V8, and 5.7L V8 engines. It is also compatible with select 7.4L models—please verify the return line location matches the center configuration shown in product images.

This pump directly replaces OEM part numbers 3888323, 3863130, 16792A39, 36368, 71317A1, 90507A3, and 18-7508, providing broad cross-compatibility across multiple marine engine platforms.

• Designed for engines with o-ring style steering hose connections (majority of applications)
• Includes hose o-ring kit and pulley installation kit
• Pump body can be transferred to your existing reservoir if preferred

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

• Power steering pump
• Hose o-ring kit (includes replacement o-ring for high pressure steering line)
• Pulley installation kit

Installation Guide

1. Verify fitment: Compare the return hose location on your existing pump to ensure it exits from the center as shown in product images.
2. Disconnect battery: Disconnect the negative terminal of your battery to prevent electrical hazards during installation.
3. Remove old pump: Disconnect the high pressure and return lines from the existing power steering pump. Cap or plug lines immediately to prevent fluid loss.
4. Inspect hose connections: Pull the high pressure line and confirm the presence of an o-ring at the end. Replace with the included o-ring if worn or damaged.
5. Transfer reservoir (optional): If desired, remove the pump body from your existing reservoir and install the new pump body using the provided o-rings.
6. Install pulley: Use the included pulley installation kit to mount the pulley onto the new pump shaft according to manufacturer torque specifications.
7. Mount new pump: Secure the pump assembly to the engine block using the original mounting bolts. Torque to specification.
8. Reconnect hoses: Attach the high pressure and return lines, ensuring o-rings are properly seated and connections are tight.
9. Fill reservoir: Add the manufacturer-recommended power steering fluid to the proper level in the reservoir.
10. Bleed air from system: Turn the steering wheel lock-to-lock several times (engine off) to purge air from the system. Top off fluid as needed.
11. Start engine and test: Start the engine and check for leaks at all connections. Turn the steering wheel through its full range and verify smooth operation.
12. Final inspection: Recheck fluid level after test and inspect all fittings for any signs of leakage or weeping.

Troubleshooting & FAQ

Q: How do I confirm this pump will fit my engine?
A: Compare your existing pump to the product images, paying close attention to the return hose location (must exit from the center). Also verify that your high pressure steering line uses an o-ring connection by pulling the line and inspecting the end.

Q: Will this work on 7.4L engines?
A: This pump fits select 7.4L models. You must compare the return line location on your current pump to ensure it matches the center-exit configuration shown in our images.

Q: Can I use my existing reservoir with this pump?
A: Yes. The pump body can be removed and installed into your existing reservoir. All necessary o-rings are included for transferring components.

Q: What if my steering line doesn't have an o-ring?
A: This pump is designed for the majority of applications that use o-ring style hose connections. If your high pressure line does not have an o-ring, this pump may not be compatible with your system.

Q: How often should I replace my power steering pump?
A: Power steering pumps typically last many years under normal conditions. Replace when you notice whining noises, difficulty steering, fluid leaks, or inconsistent steering response.

Q: Is this an OEM or aftermarket part?
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.