1) start fast,small value,low vibration,low consumption; 2) lightweight,compact,fuel efficiency; 3) used for construction This kind 173F petrol engine showing you stylish looking with lightweight and small volume,especailly for fule efficiency.model173engine typesingle cylinder 4 stroke OHV 25. dip air-cooleddisplacement (ml)242bore×stroke73×58compression ratio 8.0:1 Max power 8(5. ...