... : Single-cylinder, two-stroke, air-cooled gasoline engine2) Transmission: Automatic centrifugal clutch3) Displacement: 42cc4) Power: 1.25kW5) Drilling rotational speed: 170rpm ... type: Single-cylinder, two-stroke, air-cooled gasolineengine2) Transmission: Automatic centrifugal clutch3) Displacement: 42cc4) Power: 1.25kW5) Drilling rotational speed: 170rpm6 ...