SupplyApp's engines are gasoline-powered. They are exclusively suited for outdoor use and not for use in recreational vehicles. Easy starting is made possible with the aluminum bore and float carburetor. The cylinder sleeve of the Standard Series is made of cast iron. Select versions come with larger air, fuel, and oil filters than normal engines, as well as reinforced crankshaft journals and a self-relieving choke carburetor. Internal gearboxes with a 6:1 reduction are used in gasoline engines.