... cylinder, side valve gasoline engine Air-cooled,4-cycle,signle cylinder, side valve gasoline engine ModelEY-20D TypeAir-cooled ... ,4-cycle,signlecylinder, side valve gasoline engine Displacement(cm3)183 Rated output KW(HP)/rpm2. ... 28(3)/300 Max output KW(HP)/rpm3.73(5.0)/4000 Direction of RotationCounterclockwise, facing P.T ... Load STD20/STD40450/900 540/1080 Gasoline engine(Copy Robin Type)