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

Water Pump Impeller Replacement for Yamaha 2-Stroke & 4-Stroke Outboards 20/25 HP – OEM 6L2-44352-00

This high-quality aftermarket water pump impeller is engineered as a direct replacement for Yamaha outboard engines rated at 20 HP and 25 HP. It fits select 2-stroke 20 HP models (1996–1997) and 4-stroke F20 (2018–2021) and F25 (2016–2021) engines, ensuring reliable cooling system performance across multiple model years.

Designed to replace Yamaha OEM part number 6L2-44352-00 (also known as 6L2-44352), this impeller also cross-references with Sierra 18-3065 and CEF 500384. It is manufactured from premium-grade hardened nylon and scientifically engineered neoprene rubber for maximum durability and corrosion resistance in demanding marine environments.

• Direct fit for Yamaha 20 HP and 25 HP outboards (2-stroke and 4-stroke applications)
• Constructed with marine-grade neoprene rubber and hardened nylon for long-lasting performance
• Simple drop-in installation for routine water pump maintenance

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 × Neoprene Water Pump Impeller (replacement for Yamaha 6L2-44352-00)

Installation Guide

1. Disconnect the fuel line and remove the engine cover to access the lower unit.
2. Drain the lower unit gear oil completely and remove the propeller.
3. Unbolt and separate the lower unit from the mid-section housing.
4. Locate the water pump housing and remove the retaining bolts or screws.
5. Carefully extract the old impeller from the pump housing; note the direction of the vanes.
6. Clean all mating surfaces, gasket grooves, and the pump chamber thoroughly.
7. Lubricate the new impeller with glycerin or soapy water (never petroleum-based grease).
8. Install the new impeller into the housing, ensuring vanes are oriented in the correct rotation direction.
9. Fit a new gasket and plate, then reassemble the water pump housing onto the lower unit.
10. Reattach the lower unit to the mid-section, torque all fasteners to specification.
11. Refill the lower unit with the correct grade and quantity of gear oil, then reinstall the propeller.
12. Run the engine on a flushing system to verify proper water flow and cooling before launching.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Yamaha engine?
A: Cross-check your engine's model, horsepower, stroke type, and year against the compatibility table above. Verify your original impeller's part number matches 6L2-44352-00 or the cross-references (Sierra 18-3065, CEF 500384).

Q: How often should I replace my water pump impeller?
A: Most manufacturers recommend annual replacement or every 200–300 operating hours, whichever comes first. Replace immediately if you notice overheating, reduced water flow from the telltale, or visible cracks and wear on the vanes.

Q: What are the signs that my impeller is failing?
A: Common symptoms include engine overheating, weak or absent cooling water stream from the indicator outlet, steam from the engine, and the high-temperature warning alarm activating. Inspect the impeller if any of these occur.

Q: Can I use petroleum-based grease when installing this impeller?
A: No. Always lubricate neoprene impellers with water-based lubricants such as glycerin, dish soap solution, or dedicated impeller grease. Petroleum products can cause the rubber to swell and fail prematurely.

Q: Is this an OEM part or an aftermarket replacement?
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.