Yes, it will kill the engine completely. That's the way you want it setup in order to be able to kill your engine from the radio. There are two ways to accomplish this depending on what kind or radio you have. If you have a radio that has a throttle cut/engine kill button on it you want the throttle body to be completely closed when you push the kill button. If your radio doesn't have a kill button on it then you want the it to close completely when you move the throttle to idle and the trim tab all the way down. This will let you kill the engine with your radio.

Ken