Volvo Penta 21700445 – Raw Water Pump Impeller Kit

The Volvo Penta Raw Water Pump Impeller Kit is a genuine OEM replacement designed to maintain proper cooling water flow and protect your marine engine from overheating. Manufactured from durable marine-grade rubber, this impeller provides reliable performance in demanding freshwater and saltwater environments. 

Installation Tips

1. Shut off the engine and close the seawater intake valve before servicing.
2. Remove the raw water pump cover and carefully extract the old impeller.
3. Inspect the pump housing and wear surfaces for damage or debris.
4. Lubricate the new impeller with soapy water or glycerin and install it with the vanes bent in the direction of rotation.
5. Replace the included O-rings, reinstall the pump cover, and tighten fasteners evenly.
6. Open the seawater intake valve and verify proper water flow after engine startup.

Routine impeller replacement is recommended as part of regular preventative maintenance to ensure maximum cooling system performance and avoid costly engine damage.