Gasoline Engine--Four-stroke, air-cooled, OHV, recoil or electric start for choice Model: RE154/RE168-I/RE-168-II/RE173/RE-177/RE-182/RE-188 Bore x Stroke: 54x38/68x45/68x54/73x58/77x58/82x64/88x64 Output: 2.4/5.5/6.5/8.0/9.0/11/13hp(at 3600rpm) Ignition system: Transistorized Magneto Ignition