Remove the lower unit to access the water pump housing.

Replace the worn impeller with a new one, ensuring proper alignment.

Reassemble the pump housing and reinstall the lower unit.

Size: Varies by model (commonly 6-12 inches in diameter)

Grade: Marine-grade impeller

Viscosity: Compatible with 10W-30 or 25W-40 marine engine oil

Buoyancy: Non-buoyant (submerged operation)

Material: Nitrile rubber (NBR) or neoprene for durability and corrosion resistance

Blade Count: Typically 6-12 blades for optimal water flow

Operating Temperature: -20°F to 180°F (-29°C to 82°C)

Shaft Compatibility: Stainless steel or brass core for corrosion resistance

Installation Torque: 5-10 ft-lbs (varies by model)

Pressure Rating: 5-15 PSI (depending on pump design)

Chemical Resistance: Resistant to saltwater, gasoline, and oil

Replacement Interval: Every 1-2 years or 300-500 engine hours