6F5-44352-00 6F5-44352-01 6F5-44352-02 6F5-44352-03 676-44352-00 Water Pump Impeller for Yamaha C40 CV40 | JLM Marine

Water Pump Impeller 6F5-44352-00 6F5-44352-01 6F5-44352-02 6F5-44352-03 676-44352-00 for Yamaha C40 CV40 Outboard

This water pump impeller is engineered for Yamaha 40 HP 2-stroke 2-cylinder outboards, including C40 (1991–1997) and CV40 (1990) series. Manufactured from high-performance neoprene rubber and hardened nylon, it delivers reliable cooling system performance in harsh marine environments.

Directly replaces Yamaha OEM part numbers 6F5-44352-00, 6F5-44352-01, 6F5-44352-02, 6F5-44352-03, and 676-44352-00, as well as aftermarket equivalents from CEF Marine, Sierra, and Mallory Marine.

• Package includes: Outboard rubber impeller with key/pin
• 6-blade design for optimal water flow and cooling efficiency
• Designed for marine and chemical corrosion resistance

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

Your order includes:

• Water pump impeller with key/pin

Installation Guide

1. Disconnect the battery and remove the lower unit from the outboard motor following your service manual.
2. Remove the water pump housing by unscrewing the bolts and carefully lifting it off the drive shaft.
3. Extract the old impeller using needle-nose pliers or a flathead screwdriver. Inspect the housing for debris or damage.
4. Clean the pump housing and base plate thoroughly with a mild solvent and let dry.
5. Lubricate the new impeller blades with water pump grease or dish soap to ease installation.
6. Insert the key/pin into the drive shaft slot, ensuring it is seated properly.
7. Align the impeller hub over the key and gently slide the impeller onto the drive shaft, rotating clockwise.
8. Ensure all blades are bent in the correct rotation direction (typically clockwise when viewed from above).
9. Reinstall the pump housing carefully, making sure not to damage the impeller blades.
10. Torque the housing bolts to manufacturer specifications in a criss-cross pattern.
11. Reattach the lower unit to the outboard and reconnect the battery.
12. Test the cooling system by running the engine in a test tank or on muffs; confirm a steady stream of water from the tell-tale.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Yamaha outboard?
A: Cross-reference your engine model and year with the compatibility table above. Also verify your original OEM part number matches one of the following: 6F5-44352-00, 6F5-44352-01, 6F5-44352-02, 6F5-44352-03, or 676-44352-00.

Q: How often should I replace my water pump impeller?
A: Yamaha recommends inspecting the impeller annually and replacing it every 2–3 years or 200–300 operating hours, whichever comes first. Replace immediately if you notice cracked, melted, or missing blades.

Q: What are the signs that my impeller is failing?
A: Common symptoms include engine overheating, weak or absent tell-tale stream, steam from the engine, and reduced performance. Inspect the impeller if any of these occur.

Q: Can I install this impeller myself?
A: Yes, if you have basic mechanical skills and the proper tools. Follow your Yamaha service manual closely and use marine-grade grease during installation to prevent blade damage.

Q: Is this an OEM or aftermarket impeller?
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.