Water Pump Impeller – Fits Yamaha 20-25HP Outboard Motors (Replaces 6L2-44352-00)

Water Pump Impeller – Fits Yamaha 20-25HP Outboard Motors (Replaces 6L2-44352-00)

This water pump impeller is designed for Yamaha 2-stroke 20-25 HP (1996–2005) and 4-stroke F20-F30 HP (1998–2005) outboard motors. It serves as a direct replacement for several OEM and aftermarket parts, ensuring reliable performance for your engine’s cooling system.

Engineered to meet original equipment specifications, this impeller provides an effective and affordable solution for routine maintenance or repair.

• Installation: Direct replacement that requires lower unit removal.
• Material: Constructed from durable, high-quality neoprene rubber for longevity.
• Function: Restores cooling system efficiency to prevent engine overheating.

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.

Technical Specifications

Package Contents

• 1 x Water Pump Impeller (6L2-44352-00-00)
• 1 x O-Ring (when purchased as part of a kit)
• 1 x Key (when purchased as part of a kit)

Installation Guide

1. Disconnect Power: Disconnect the battery and spark plug wires for safety.
2. Drain Gearcase: Drain the gearcase oil to prevent spills.
3. Remove Lower Unit: Loosen and remove the bolts securing the lower unit (gearcase) to the engine's midsection.
4. Access Water Pump: With the lower unit removed, locate and unbolt the water pump housing cover.
5. Remove Old Impeller: Slide the old impeller off the driveshaft. Note the direction of the vanes as you remove it.
6. Install New Impeller: Lightly lubricate the new impeller and housing. Slide the new impeller onto the driveshaft, rotating it counter-clockwise to correctly orient the vanes.
7. Reassemble Pump: Reinstall the water pump housing and gasket, ensuring a tight seal.
8. Reattach Lower Unit: Carefully guide the driveshaft back into place and secure the lower unit with its bolts. Refill the gearcase oil.
9. Test Operation: Reconnect the battery and start the engine in a test tank or with a water flusher to confirm a steady stream of water from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Yamaha engine?

A: First, check the Compatible Engine Models table on this page. For additional confirmation, use the official Yamaha Serial Number Guide and Parts Catalog linked above to verify that 6L2-44352-00-00 is the correct part number for your specific model and year.

Q: How often should I replace the water pump impeller?

A: We recommend replacing the impeller every 100 operating hours or annually, whichever comes first. This is standard preventative maintenance to avoid engine damage from overheating.

Q: What are the signs of a worn or failing impeller?

A: The most common signs include the engine running hotter than normal, a weak or intermittent water stream from the "tell-tale" outlet, or in severe cases, a steam or overheating alarm.

Q: Is this an 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.