I use a DX6i. There is a "Throttle Cut" button. So there is a way to program this button so that it will take the throttle from "almost" closed to fully closed?
ORIGINAL: carrellh
What transmitter do you have?
My transmitter has mechanical trims. I pull the throttle all the way back, and the trim all the way back. Then I adjust the pushrod so the carb is fully closed. When the trim is moved forward the carb opens slightly and I can use it to adjust the idle.
If you have a computer radio with digital trims, look for a "throttle cut" function that is typically assigned to a switch. This function could have a dozen different names depending on the brand and model of your transmitter.