Hmm.. Well, there are several items that you should have been aware of, or should have been told regarding linkage from the servo to the carb throttle arm.

The whole process takes a few minutes to set up and get right before you even attempt to start an engine with throttle control. Let me take a few minutes to outline this for you and maybe help you get off on the right foot here.

First of all, it is very important to make sure your throttle servo is centered and that you have selected the right "hole" on the servo arm for the proper and correct end-to-end movement from control from the transmitter. This involves setting up the linkage for full movement WITHOUT binds on either end.

Next, you have to determine what is full throw for the throttle arm on the carb.

Ok. You have both, now you have to combine this so that you have full movement from idle to full open without binds on either end. You DO NOT want to have the servo move further than full open or full closed. This will draw lots of excessive current from your battery pack and severely shorten flight time. Binds are bad.

Ok. Next step is to select the proper hole in both the servo arm AND the throttle arm so that you have full and unhindered movement of the throttle linkage from full closed to full open... including trim and the engine cut-off switch or button if you have that on your TX.

Once you are happy that there is full movement without binds.. meaning that on your TX throttle stick, fully closed means fully closed on your carb without movement of the servo beyond fully closed on the throttle, or fully open on your carbg without further movement of the servo beyond full open does not occur.

Hey, this takes a little time in the initial setup. If you have a computer radio, don't.. DO NOT rely on end points at first. Use this only after you have the mechanical adjustment correct, then fine tune it using the end-points on your TX.

I've outlined a process in a previous posting on how to do the servo centering and basic adjustments on your throttle.

I will try to find it and put this in a subsequent post in this thread.

CGr.