6L2-44352-00 Water Pump Impeller for Yamaha F20 F25 | JLM Marine

Water Pump Impeller for Yamaha F20 F25 Outboard – 6L2-44352-00

This high-performance water pump impeller is engineered for Yamaha 2-stroke 20 HP (1996–1997) and 4-stroke F20 (2018–2021) and F25 (2016–2021) outboard engines. Constructed from hardened nylon and neoprene rubber, it ensures reliable cooling performance and long service life in demanding marine environments.

Direct Replacement for OEM Part Numbers: 6L2-44352, 6L2-44352-00. This impeller is designed to meet or exceed OEM specifications, delivering dependable water pump operation at a competitive price point.

• Includes impeller with key/pin for secure shaft mounting
• 6-blade design with 52mm external diameter for optimal flow
• Compatible with both 2-stroke and 4-stroke Yamaha engines

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 × Outboard Rubber Impeller with Key/Pin

Installation Guide

1. Disconnect the fuel line and ensure the engine is off and cool before starting any work.
2. Remove the lower unit by loosening the mounting bolts and carefully separating it from the mid-section.
3. Locate the water pump housing on the lower unit and remove the retaining screws or bolts.
4. Carefully extract the old impeller from the housing, noting the blade orientation for correct installation.
5. Inspect the housing and insert for wear, corrosion, or debris; clean thoroughly before proceeding.
6. Lubricate the new impeller blades with soapy water or glycerin to ease installation and prevent damage.
7. Insert the key/pin into the impeller shaft slot, ensuring it seats properly.
8. Carefully install the new impeller into the housing, ensuring blades are oriented in the correct rotation direction.
9. Reassemble the water pump housing and torque all fasteners to manufacturer specifications.
10. Reinstall the lower unit onto the mid-section, aligning the shift rod and water tube carefully.
11. Reconnect the fuel line and run the engine in a test tank to verify proper water flow from the telltale.
12. Check for leaks around the water pump housing and lower unit seals; re-torque fasteners if necessary.

Troubleshooting & FAQ

How do I confirm this impeller fits my Yamaha engine?
Verify your engine model and year against the compatibility table above. For Yamaha engines, check the model decal on the transom bracket or use the serial number guide linked in the Compatible Engine Models section to identify your exact engine.

How often should I replace my water pump impeller?
Yamaha recommends replacing the impeller every 2–3 years or 200–300 operating hours, whichever comes first. If you frequently operate in sandy or debris-laden water, inspect and replace more often to prevent cooling system failure.

What are the signs of a failing impeller?
Common symptoms include weak or no water flow from the telltale (pee hole), engine overheating, steam from the powerhead, or a drop in performance. If you notice any of these, inspect the impeller immediately to avoid engine damage.

How does this aftermarket impeller compare to the Yamaha OEM part?
This impeller is manufactured to OEM specifications using marine-grade neoprene rubber and hardened nylon. It provides equivalent performance and durability at a more competitive price, making it a cost-effective alternative for routine maintenance.

Can I install this impeller myself, or do I need a professional?
If you have basic mechanical skills and the proper tools, you can install this impeller yourself by following the installation guide. However, if you're unfamiliar with lower unit disassembly or torque specifications, professional installation is recommended.

What's the difference between OEM and aftermarket impellers?
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.