single cylinder,air-cooled,two-stroke Chain brake less than 0.12s Displacement: 42.7CC KNAPSACK brush cutters Model NO:QY-BG40F-5A single cylinder,air-cooled,two-stroke Engine Displacement: 42.7CC Engine model: 1E40F-5Engine power:1.25KW/6500rpmDiaphragm typeStarting system:Recoiled,iuauel Carburetor type Ignition:C.D.I ldling Speed :2800rpm Chain brake less than 0.12s CE