Water Pump Impeller With Key For YAMAHA 688-44352-03-00 18-3070 75/80/85/90 HP

Water Pump Impeller with Key for Yamaha

This water pump impeller with key replaces Yamaha OEM part number 688-44352-03-00 and cross-reference 18-3070 for Yamaha outboard engines rated at 75, 80, 85, and 90 horsepower.

Overview

This water pump impeller is built for Yamaha outboards in the 75 to 90 HP range, ensuring consistent coolant flow to prevent engine overheating. The included key locks the impeller securely to the driveshaft, and the design matches the original OEM spec. Replace a worn water pump impeller with this dependable part for reliable cooling performance.

Built For Performance

• Includes a key for positive drive engagement
• Precision-molded rubber vanes for efficient water flow
• Corrosion-resistant materials for long service life
• Direct replacement for OEM 688-44352-03-00
• Compatible with 75, 80, 85, and 90 HP Yamaha outboards

Fits These Machines

• for Yamaha 75 HP outboard
• for Yamaha 80 HP outboard
• for Yamaha 85 HP outboard
• for Yamaha 90 HP outboard

On-The-Job Use

• Used during routine water pump service on Yamaha outboards
• Ideal for saltwater and freshwater cooling systems
• Replaces worn impellers that cause overheating
• Essential for maintaining peak engine performance

Specs At A Glance

Good To Know

Q: How often should I replace the water pump impeller? A: Yamaha recommends replacing the impeller every 2 to 3 years or about 300 hours of operation, whichever comes first.

Q: Does this impeller come with the key? A: Yes, the key is included to properly seat the impeller on the driveshaft.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.