DuroMax XP7HPE 7 hp Electric/Recoil Start Engine Max Torque: 13.2 Nm/9.7 ft./lb. Maximum 7 horse power EPA approved 4 stroke engine with electronic ignition Air Cleaner: Dual, Semi-dry, Oil Bath Shaft Size: 3/4" Diameter , 2-3/8" Long, 3/16" Kw, shaft end drilled & tapped with 5/16" 24 UNF Dimensions: 17.3" L, 16.7" W, 17.12" H Electric and Recoil Start. Recommended Fuel Type : Gasoline - 87 Octane Rating Or Better