Sea Water Pump Serpentine Pulley for MerCruiser 4.3-6.2 L 862351T

Sea Water Pump Serpentine Pulley – Fits MerCruiser 4.3L, 5.0L, 5.7L, 6.2L

This replacement serpentine pulley is engineered for MerCruiser raw water pumps on 4.3L, 5.0L, 5.7L, and 6.2L engines that utilize a single serpentine belt system. It offers a reliable, direct-fit solution for worn or damaged pulleys, ensuring proper engine cooling system performance.

Designed as a direct replacement for Mercury/MerCruiser parts 862351T, 8M0150724, and 862351, this component ensures seamless integration with the specified engine models.

• Features a durable steel housing with corrosion-resistant EDP paint.
• Engineered for a direct bolt-on installation with your Mercruiser brass seawater pump.
• Designed specifically for single serpentine belt drive systems.

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 Sea Water Pump Serpentine Pulley (862351T/8M0150724)

Explosion Diagram

Installation Guide

1. Disconnect the boat's battery before beginning work.
2. Locate the serpentine belt tensioner and relieve the tension to remove the belt from the sea water pump pulley.
3. Carefully unbolt and remove the old pulley from the sea water pump assembly.
4. Visually compare the new pulley with the old one to ensure an exact match.
5. Mount the new pulley onto the pump, ensuring it is properly seated.
6. Tighten the mounting bolts to the manufacturer's recommended torque specifications.
7. Reinstall the serpentine belt, making sure it is correctly routed and tensioned.
8. Reconnect the battery, start the engine, and check for proper operation and alignment.

Troubleshooting & FAQ

Q: How do I confirm this fits my MerCruiser engine?

A: The best way is to check your engine model and year against our compatibility table. This pulley is designed for MerCruiser 4.3L, 5.0L, 5.7L, and 6.2L engines (2000-2009) that use a single serpentine belt and are equipped with the brass raw water pump (compatible with REC46-862914T10). Also, confirm the dimensions: the pulley has an outside diameter of 5.7 inches (144.8 mm).

Q: What are the signs my sea water pump pulley is failing?

A: Common signs of a failing pulley include a noticeable wobble while the engine is running, persistent squeaking or grinding noises from the pump area, and visible cracks, chips, or excessive corrosion on the pulley itself. A damaged pulley can lead to belt failure and engine overheating.

Q: Is this a direct replacement for the original OEM part?

A: Yes, this is a direct bolt-on replacement for Mercury/MerCruiser part numbers 862351T and 8M0150724. It is manufactured to meet or exceed OEM specifications for fit, form, and function, ensuring a seamless installation.

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.