... ,cylinder,spark plug,piston 2.Light weight,easy start,low vibration, 3.Adjustable front handle 1)Engine: 1E139QF,4-stroke,air cooling2)Displacement ... :31CC3)Revolving diameter: 255mm 4)Max power:0.735KW 5)Revolving speed ... ,80T blade or nylon cutter as customer required Back pack,4-stroke brush cutter