68T-44352-00 Water Pump Impeller for Yamaha F6 F8 F9.9 | JLM Marine

Water Pump Impeller for Yamaha 4-Stroke Outboards – F6, F8, F9.9 HP (2001–2021)

This precision-engineered water pump impeller is designed to fit Yamaha 4-stroke outboard motors ranging from 6 HP to 9.9 HP. It ensures reliable cooling system performance across the F6, F8, and F9.9 series engines manufactured between 2001 and 2021. Built from high-performance neoprene rubber and hardened nylon, this impeller delivers durability and longevity in demanding marine environments.

This replacement impeller cross-references multiple OEM and aftermarket part numbers, including Yamaha 68T-44352-00, Sierra 18-8910, CEF 500368, and Mallory 9-45614, providing broad compatibility for maintenance and repair applications.

• 6-blade design optimized for efficient water flow and cooling performance
• Direct replacement for Yamaha OEM part 68T-44352-00
• Engineered for easy installation during 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

• Outboard Water Pump Impeller (1 piece)

Installation Guide

1. Disconnect the fuel line and remove the engine cowling to access the lower unit.
2. Drain the gear oil and remove the propeller, followed by the lower unit bolts.
3. Carefully separate the lower unit from the midsection of the motor.
4. Remove the water pump housing bolts and lift off the pump housing. Take note of gasket orientation.
5. Extract the old impeller from the pump body using needle-nose pliers if necessary. Inspect the impeller housing and plate for wear or damage.
6. Apply a thin coat of marine grease to the new impeller blades and the inside of the pump housing to ease installation.
7. Insert the new impeller into the pump housing, ensuring the blades align correctly with the drive pin. Rotate the driveshaft clockwise to seat the impeller properly.
8. Replace all gaskets and O-rings with new ones; reuse of old gaskets may cause leaks.
9. Reassemble the water pump housing and secure it with the original bolts, tightening to manufacturer specifications.
10. Reattach the lower unit to the midsection, ensuring proper alignment of the driveshaft.
11. Refill the gear oil to the correct level and reinstall the propeller.
12. Test the cooling system by running the engine with water supply (muffs or tank) and verify water discharge from the telltale port.

Troubleshooting & FAQ

How do I confirm this impeller fits my Yamaha outboard?
Verify your engine model and year against the compatibility table above. Cross-check the OEM part number (68T-44352-00 or equivalents) in your owner's manual or on the old impeller. Yamaha owners can use the serial number guide or consult exploded parts diagrams to confirm fitment.

How often should I replace my water pump impeller?
Most manufacturers recommend replacing the impeller every 2–3 years or 300–400 hours of operation, whichever comes first. If you notice overheating, reduced water flow from the telltale, or visible damage to the impeller blades, replace it immediately.

What are the signs of a failing impeller?
Common symptoms include engine overheating, weak or no water stream from the cooling telltale, steam from the engine, and reduced performance. Inspect the impeller annually and replace if blades are cracked, broken, or permanently bent.

Do I need to replace any other parts when installing a new impeller?
Yes, it is highly recommended to replace all water pump gaskets, O-rings, and seals during impeller replacement to prevent leaks and ensure optimal performance. Reusing old gaskets can compromise the seal and lead to cooling system failure.

Can I install this impeller myself, or do I need a mechanic?
If you have basic mechanical skills and the proper tools, you can replace the impeller yourself by following the installation guide. However, professional installation is recommended if you are unfamiliar with outboard maintenance or if you lack experience working with lower units.

OEM vs. Aftermarket – What's the difference?
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.