Replacement Propeller Propeller Dia (In.) 18 in Bore Dia (In.) 1/2 in Bore Dia (mm) 12.7 mm Pitch 23.9 Degrees Rotation CW Hub Location Centralized Number of Blades 3 HP 1/3 hp RPM 1725 RPM Drive Type Direct Blade Material Aluminum For Use With 10D986D