1. air cooled, 4 cycle, single cylinder, side valve 2. max output 5.0 hp ... . automobile gasoline unleaded 4. recoil starter ModelFSH20-ATypeair-cooled, 4-cycle, single clinder, side valveBroke*stroke(mm)67*52Displacement(cm3)183Rated ... Starting system Recoil starter 5.0 hp single cylinder 4-cycle gasoline engine