Water Pump Impeller – Fits Yamaha 6-15 HP Outboard Motors (Replaces 662-44352-01-00, 662-44352-00-00)

Water Pump Impeller – Fits Yamaha 6–15 HP Outboard Motors (Replaces 662-44352-01-00)

This water pump impeller is designed for select Yamaha 2-stroke 6 HP, 8 HP, and 15 HP outboards and Mercury/Mariner 2-stroke 8–15 HP models manufactured from the early 1980s through the early 1990s. Its durable neoprene and hardened nylon construction ensures reliable performance and longevity.

It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring a precise fit and restoring your engine’s cooling system to factory specifications.

• Installation: Direct OEM-equivalent replacement
• Material: High-strength neoprene with a hardened nylon hub
• Included Parts: 1 x Water Pump Impeller (662-44352-01-00)

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 Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

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.

Yamaha Models

Mercury/Mariner Models

Technical Specifications

Package Contents

1 x Water Pump Impeller (Replaces 662-44352-01-00)

Installation Guide

1. Disconnect the negative battery cable for safety.
2. Unbolt and remove the lower unit (gearcase) from the outboard motor.
3. Locate and remove the bolts securing the water pump housing cover.
4. Slide the old impeller off the driveshaft, taking note of the keyway alignment.
5. Clean the housing and inspect it for wear, cracks, or corrosion.
6. Lightly lubricate the new impeller and housing with marine grease.
7. Slide the new impeller onto the driveshaft, aligning the key.
8. Turn the driveshaft clockwise to bend the blades correctly while re-installing the housing.
9. Secure the water pump housing cover with the bolts, tightening them to the manufacturer's torque specifications.
10. Re-install the lower unit, ensuring all connections are secure.
11. Reconnect the battery cable and test the engine's cooling stream at idle.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my specific engine?
A: The most reliable method is to match your engine's model and serial number against the compatibility tables above. Use the provided serial number guides for Yamaha and Mercury to verify your engine's details. Comparing the product images and dimensions to your old part is also a critical final check.

Q: What are the common signs of a failing water pump impeller?
A: The most common signs include the engine overheating at idle or low speeds and a weak or intermittent water stream from the "telltale" outlet port. Reduced engine performance can also indicate a cooling system issue.

Q: How often should I replace the water pump impeller?
A: For preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of use, depending on operating conditions (especially in saltwater or sandy/silty water). Always consult your engine's service manual for specific intervals.

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.