Kyosho 74102 is a high-quality model engine with a variety of features that make it ideal for use in radio-controlled models. The engine is equipped with a throttle lever that adjusts the amount of air-fuel mixture and controls engine rpm, as well as a carburetor that mixes air and fuel appropriately to control engine running. The high-speed needle adjusts the amount of fuel inflow for the mixture, while the idle speed screw adjusts the carburetor opening when idling. A glow plug ignites the compressed air-fuel mixture, and a recoil starter starts the engine.