... 2.less fuel consumption 3.novel design 4. stable performance. Engine type:139F, 4-stroke,air cooled,single cylinderMixing ratio:1: ... considered in Yongkang,Zhejiang. Suitable for: lawn, fruit trees, tea, vegetables, roadside hedges and otherApplication Place: plains, hillsApplicable areas: ... low noise,less fuel consumption,large displacement . 139F 4-Stroke 31cc professional lawn mower machine