... Mower RQ03-LM18 lawn mowerEngine1P64FEngine TypeSingle Cylinder,Two-Stroke,Air-cooled ,Gasoline EngineDisplacement135ccPower Output4.0HPFuel Mixed RatioGasoline:Two- ... the exhaust pipe with exhaust smoke,engine overheat, air filter oil susceptible to choking humidity, which affect horsepower ... , more serious filter will be absorb into the air, resulting in the inability to affect the machine. ...