Water Pump Impeller for Yamaha 20 25 HP 6L2-44352-00-00

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

This water pump impeller is designed for specific Yamaha 2-Stroke 20HP & 25HP outboard motors, covering models from 1988 and newer, including the 25MSH/6L2K. It serves as a direct replacement component to restore your engine's cooling system performance.

Engineered to meet or exceed OEM specifications, this impeller is a reliable aftermarket replacement for Yamaha part number 6L2-44352-00-00 and other equivalent parts.

• Direct Replacement: Installs using original factory hardware and mounting points.
• Durable Construction: Made from high-quality rubber with a metallic hub insert for long-lasting service.
• Package Includes: 1 x Water Pump Impeller.

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 Impeller (Replaces 6L2-44352-00-00)

Installation Guide

1. Safety First: Disconnect the engine's battery cables to prevent accidental starting.
2. Access the Lower Unit: Remove the bolts securing the lower unit (gearcase) to the engine leg and carefully lower it.
3. Open the Water Pump: Unscrew the bolts on the water pump housing cover to expose the impeller.
4. Remove Old Impeller: Note the rotational direction of the old impeller fins before carefully sliding it off the driveshaft.
5. Clean and Inspect: Clean any debris or corrosion from the inside of the pump housing and inspect it for wear or damage.
6. Install New Impeller: Lightly lubricate the new impeller and housing. Slide the new impeller onto the driveshaft, aligning it with the key slot.
7. Reassemble Housing: Rotate the driveshaft in a clockwise direction while pushing down on the housing to correctly orient the impeller fins. Secure the housing cover.
8. Reattach Lower Unit: Guide the lower unit back into place, ensuring the driveshaft and water tube align correctly before tightening the bolts.

Troubleshooting & FAQ

How do I confirm this fits my engine?
First, check your engine's model, year, and horsepower against our "Compatible Engine Models" table. Second, use the "Part Number Cross-Reference" table to see if your existing part number matches any of the listed equivalents.

What are the signs of a failing water pump impeller?
Common signs include the engine overheating alarm sounding, a visibly weak or non-existent stream of water from the tell-tale outlet, or a high engine temperature reading on your gauges.

How often should I replace the impeller?
For preventative maintenance, it is recommended to replace the impeller every 1-2 years or every 100-200 hours of use, whichever comes first. Refer to your owner's manual for specific service intervals.

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.