Replacement Propeller Propeller Dia (In.) 20 in Bore Dia (In.) 5/8 in Bore Dia (mm) 15.87 mm Pitch 20.5 Degrees Rotation CW Hub Location Centralized Number of Blades 3 HP 3/4 hp RPM 1753 RPM Drive Type Direct Blade Material Aluminum For Use With 10D988D