If I back out the throttle stop the carb will turn in all the way. The barrel isn't jamming.
You know how a normal throttle stop screw works. You can turn it in and stop the barrel from closing all the way, right? Well I always set mine up so the barrel can close all the way. If you back out the screw far enough you can remove the barrel.
Well this one if you back it out far enough for the barrel to close all the way then it releases the barrel. In fact, it releases the barrel before it's closed all the way.
So if it's designed that way then my hope is that it's because the engine won't run with the throttle closed that far so it's a non-issue. If the engine will run then it's a real problem because it means I can't shut down my engine from the transmitter.