6E0-44352-00 Water Pump Impeller with Key for Yamaha F4 F6 | JLM Marine

Water Pump Impeller with Key – Fits Yamaha 4 HP & 6 HP 2-Stroke/4-Stroke Outboards

This aftermarket water pump impeller with key is designed to fit Yamaha 4 HP and 6 HP outboard motors, covering both 2-stroke and 4-stroke models from 1984 and up. It ensures reliable cooling system performance for your Yamaha F4, F6, and legacy 4 HP/5 HP engines.

This impeller directly replaces OEM part numbers 6E0-44352-00, 6E0-44352-01, and 6E0-44352-03, as well as aftermarket equivalents from CEF Marine, Sierra Marine, and Mallory Marine.

• Includes impeller with drive key/pin for complete installation
• 6-blade design with precise OEM-spec dimensions
• Compatible with both 2-stroke and 4-stroke Yamaha small outboards

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

• Water Pump Impeller with Key/Pin

Installation Guide

1. Disconnect the fuel line and remove the engine cover to access the lower unit.
2. Remove the propeller and drain gear oil from the lower unit.
3. Unbolt and carefully separate the lower unit from the midsection.
4. Remove the water pump housing bolts and lift off the housing to expose the old impeller.
5. Carefully remove the old impeller and drive key from the driveshaft. Inspect the housing and plate for wear or scoring.
6. Lubricate the new impeller blades with glycerin or soapy water (never petroleum-based grease).
7. Insert the drive key into the driveshaft slot, ensuring it is fully seated.
8. Slide the new impeller onto the driveshaft with blades oriented in the correct rotation direction (usually clockwise when viewed from above).
9. Reinstall the water pump plate and housing, ensuring all gaskets are properly aligned and O-rings are in place.
10. Reattach the lower unit to the midsection, tightening bolts to the manufacturer's torque specifications.
11. Refill the lower unit with the appropriate gear oil, reinstall the propeller, and reattach the engine cover.
12. Run the engine in a test tank or on-water and confirm a steady stream of water from the telltale (pilot hole).

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Yamaha engine?
A: Cross-reference your engine model and year in the Compatible Engine Models table above. You can also verify by matching the OEM part number (6E0-44352-00, 6E0-44352-01, or 6E0-44352-03) stamped on your original impeller or listed in your engine's parts diagram.

Q: How often should I replace my water pump impeller?
A: Yamaha recommends replacing the impeller every 2–3 years or 200–300 operating hours, whichever comes first. If you operate in sandy, silty, or debris-heavy water, inspect and replace it annually.

Q: What are the signs that my impeller is failing?
A: Common symptoms include weak or no water flow from the telltale, engine overheating, steam from the engine, or reduced performance. Inspect the impeller immediately if any of these occur.

Q: Does this impeller come with the drive key?
A: Yes, this kit includes both the impeller and the drive key/pin required for installation.

Q: Can I use this impeller on both 2-stroke and 4-stroke Yamaha engines?
A: Yes, this impeller is compatible with both 2-stroke (4 HP 1984–1999, 5 HP 1984–2002) and 4-stroke (F4 1984 & up, F6 2006 & up) models as listed in the compatibility table.

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.