Call   Cylinder Capacity 15.6 cu.in 256 ccm Power Rating 20.0 HP 14.0 kW Bore Diameter 1.93 in 42 mm Stroke 0.74 in 19 mm Weight 15 lbs 6800 g Speed Range 800-7000 RPM Crankshaft 3 Ball bearings Connecting Rod Needle bearings on both ends Lubrication System Oil Pan & Gear Oil Pump Ignition 6.0 Vs Propeller - 2 Bladed 36 x 14   36 x 18