Water Pump Impeller – Fits Yamaha 2.5HP & 3HP Outboards (Replaces 6L5-44352-00-00)

Water Pump Impeller – Fits Yamaha 2.5HP & 3HP Outboards (Replaces 6L5-44352-00-00)

This water pump impeller is designed for select Yamaha outboards, including the 2.5HP 4-Stroke (F2.5A/B) from 2003–2021 and the 3HP 2-Stroke (3A/Malta) from 1988–2002. It serves as a direct replacement part, ensuring reliable performance for your engine's cooling system.

Engineered to meet OEM specifications, this impeller is a direct substitute for multiple part numbers, including Sierra 18-8911, Mallory 9-45615, and CEF 500322.

• Engineered for direct OEM replacement installation.
• Features a durable 6-blade rubber design for efficient water circulation.
• Package includes one 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 Water Pump Impeller (6L5-44352-00-00)

Installation Guide

1. Disconnect the negative battery cable and shift the outboard into the neutral position.
2. Remove the mounting bolts that secure the lower unit (gearcase) to the upper engine casing.
3. Carefully lower and separate the lower unit from the driveshaft housing.
4. Locate the water pump housing on top of the gearcase and remove its bolts.
5. Lift the water pump housing and slide the old impeller off the driveshaft. Note the direction of the old blades.
6. Clean the interior of the pump housing and inspect the wear plate for scoring or damage.
7. Lightly lubricate the new impeller with grease and slide it onto the driveshaft.
8. Turn the driveshaft clockwise while pressing down on the impeller to seat the blades in the correct direction.
9. Reinstall the water pump housing and torque the bolts to the manufacturer's specified value.
10. Reattach the lower unit, ensuring the driveshaft and shift shaft are properly aligned.
11. Once assembled, test the engine in the water to confirm a steady stream from the cooling system's tell-tale port.

Troubleshooting & FAQ

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

A: Check your engine's model and year against the "Compatible Engine Models" table. This impeller is a direct replacement for Yamaha OEM part 6L5-44352-00-00 and fits F2.5A/B (2003-2021) and 3A/Malta (1988-2002) models.

Q: What are the signs of a failing water pump impeller?

A: Common symptoms include the engine overheating, an alarm sounding, or a weak or non-existent water stream from the "tell-tale" outlet. Upon inspection, a worn impeller may have cracked, brittle, or missing blades.

Q: How often should I replace the impeller?

A: For preventative maintenance, it is recommended to replace the water pump impeller every 1-2 years or every 100-200 hours of operation, especially if you frequently operate in saltwater or sandy/silty conditions.

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.