... consumption 3.novel design 4. stable performance. Engine type:139F, 4-stroke,air cooled,single cylinderMixing ratio:1:25Displacement:31ccPower:0. ... plains, hillsApplicable areas: forestry, agricultureProduct Type: NewWe are specialize in 139F brush cutter,140Fbrush cutter and GX35 brush cutter.This ... low noise,less fuel consumption,large displacement . 139F 4-Stroke 31cc professional lawn mower machine