Water Pump Impeller for 10/15/18/20/25 hp Johnson Evinrude 775518 18-3002 375638

Water Pump Impeller for Johnson Evinrude

This water pump impeller is a replacement cooling system component for Johnson Evinrude outboards rated at 10/15/18/20/25 hp, and it cross-references OEM part 775518, for Sierra 18-3002, and 375638. It circulates water through the engine block to keep operating temperatures stable and prevent damage from overheating.

Overview

The water pump impeller for Johnson Evinrude outboards is a direct replacement part for engines in the 10, 15, 18, 20, and 25 hp range. It moves water through the cooling passages whenever the engine is running, protecting the powerhead from excessive heat. This impeller is intended for Johnson Evinrude applications that use part numbers 775518, 18-3002, and 375638.

Built For Performance

• Replaces OEM part 775518 and cross-references for Sierra 18-3002 and 375638
• Flexible molded blades deliver consistent water flow through the cooling system
• Made from heat- and oil-resistant material for long service life
• Sized specifically for 10/15/18/20/25 hp Johnson Evinrude outboards
• Provides dependable engine cooling during extended runs

Fits These Machines

• for Johnson Evinrude 10 hp outboards
• for Johnson Evinrude 15 hp outboards
• for Johnson Evinrude 18 hp outboards
• for Johnson Evinrude 20 hp outboards
• for Johnson Evinrude 25 hp outboards

On-The-Job Use

• Installed during routine water pump service on compatible outboards
• Replaces worn impellers that have cracked or missing blades
• Used to restore cooling flow after a suspected overheating event
• Commonly paired with lower unit and water pump housing maintenance

Specs At A Glance

Good To Know

Q: How often should the water pump impeller be replaced? A: Check the impeller at least once a year or whenever cooling flow drops. Replace it if blades are cracked, worn, or stuck in a curved position.

Q: Will this impeller fit the intended outboard? A: It is designed for Johnson Evinrude outboards in the 10, 15, 18, 20, and 25 hp range. Verify the engine's serial number and original impeller part number before installing.

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