The Mercruiser 470 Impeller is a critical component of the marine cooling system. It ensures proper water circulation to prevent engine overheating. Regular inspection and replacement are essential for optimal performance.

The Mercruiser 470 Impeller is typically made of neoprene or nitrile rubber for durability and resistance to marine conditions. It has an outer diameter of approximately 4.5 inches and an inner hub diameter of around 0.75 inches. The impeller blades are designed for optimal water flow, with a standard thickness of 0.25 inches. The material grade is marine-grade rubber, ensuring resistance to saltwater and UV degradation. Viscosity compatibility is suited for standard marine coolant or raw water systems. Buoyancy is minimal due to the dense rubber construction. The impeller is designed for use in Mercruiser 470 marine engines, ensuring proper cooling system performance.

Marine pumps for the Mercruiser 470 are typically constructed from cast aluminum or stainless steel for corrosion resistance. The pump housing has a standard inlet/outlet size of 1.25 inches to match marine hose fittings. The impeller rotates on a stainless steel shaft with a ceramic or carbon seal for longevity. Pump flow rates range between 20-30 gallons per minute (GPM) depending on engine RPM. The material grade is marine-certified, with a viscosity rating suitable for water or coolant systems. Buoyancy is negligible due to the metal construction. These pumps are designed for raw water or closed-loop cooling systems in marine applications.