8M0153706 Sea Water Pump Pulley for Mercruiser V6 V8 | JLM Marine

8M0153706 Sea Water Pump Pulley for Mercruiser V6 V8 Engines

This aftermarket sea water pump pulley is engineered for MerCruiser V6 and V8 marine engines equipped with serpentine belt systems (1997–2002). It ensures reliable coolant circulation for engine models ranging from the GM 4.3L V6 to the 8.2L V8, supporting optimal thermal management in fresh and saltwater environments.

This pulley directly replaces OEM part numbers 8M0153706, 807729, and 807729T (Volvo Penta Marine / MerCruiser). It is designed to match factory specifications for fit and durability, ensuring seamless integration with your existing cooling system.

• Compatible with MerCruiser V6 & V8 engines with serpentine belt configuration (1997–2002)
• Designed for 6-inch circulating water pumps
• Direct replacement for multiple OEM part numbers across MerCruiser and Volvo Penta Marine

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 × Sea Water Pump Pulley

Installation Guide

1. Disconnect the battery to ensure safety during installation.
2. Relieve belt tension by loosening the serpentine belt tensioner. Remove the belt from the water pump pulley.
3. Remove the old pulley by unbolting it from the water pump shaft using the appropriate socket or wrench.
4. Inspect the pump shaft for wear, corrosion, or damage. Clean the mounting surface thoroughly.
5. Align the new pulley onto the water pump shaft, ensuring proper orientation and seating.
6. Secure the pulley with the mounting bolts, tightening in a crisscross pattern to the manufacturer's torque specification.
7. Reinstall the serpentine belt according to the belt routing diagram for your engine model.
8. Check belt tension and adjust the tensioner if necessary to ensure proper operation.
9. Reconnect the battery and start the engine to verify proper pulley rotation and belt alignment.
10. Inspect for unusual noise or vibration during initial engine operation. Recheck belt tension after a short test run.

Troubleshooting & FAQ

Q: How do I confirm this pulley fits my MerCruiser engine?
A: Verify that your engine is a V6 or V8 GM model (4.3L, 5.0L, 5.7L, 6.2L, 7.4L, or 8.2L) manufactured between 1997 and 2002 with a serpentine belt system. Cross-check your existing pulley's OEM part number (8M0153706, 807729, or 807729T) to confirm compatibility.

Q: What are the signs that my water pump pulley needs replacement?
A: Common symptoms include unusual squealing or grinding noises from the belt area, visible wear or cracks on the pulley surface, belt slippage, or overheating due to insufficient coolant circulation. If the pulley wobbles or shows signs of corrosion, replacement is necessary.

Q: Can I use this pulley on engines with V-belt systems instead of serpentine belts?
A: No, this pulley is specifically designed for MerCruiser engines equipped with serpentine belt configurations (1997–2002). Using it on V-belt systems may result in improper fit and belt misalignment.

Q: How often should the water pump pulley be inspected or replaced?
A: Inspect the pulley during routine cooling system maintenance or whenever you replace the water pump or serpentine belt. Replace it if you notice wear, damage, or misalignment; typically, pulleys can last several years under normal operating conditions.

Q: What is the difference between this aftermarket pulley and the OEM 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.