ORIGINAL: Ron Olson

OK, here's how I used to set up my throttles on my OB tunnels.
Turn both radio systems on. Hold the throttle wide open and while doing that, shut off the receiver. You can shut off the transmitter if you wish then. Next set up your linkage so that the barb is wide open then tighten everything down. Turn the TX (if you shut it off) and the RX back on. Hopefully now the throttle servo will go back to the idle position.
Before doing all of this, make sure all trim adjustments are at zero.
If it goes too far in either direction then adjust your end point adjustments.
You mentioned ''stick''. I know that you meant trigger. I've got an old JR XR-3 that I'm still using.