The Onan 6.5 MCCK impeller and marine pump specifications are as follows:
Size: Typically 2.5 inches in diameter (varies slightly by model).
Grade: Marine-grade rubber or neoprene.
Viscosity: Designed for use with water (low viscosity fluids).
Buoyancy: Not applicable (non-buoyant material).
Material: Nitrile rubber (NBR) or neoprene for corrosion resistance.
Operating Temperature Range: -20°F to 180°F (-29°C to 82°C).
Pressure Rating: Up to 30 PSI (varies by pump model).
Compatibility: Saltwater and freshwater use.
Impeller Blades: Typically 6-8 flexible vanes.
Shaft Fit: Standard 3/8-inch keyed or splined shaft.