ORIGINAL: CGRetired
One thing you might take a look at is if there is a bind in the throttle linkage... is the servo trying to push the throttle arm further than it can go... which would involve a look at a throttle movement adjustment. I did an in-depth explanation of how I do my throttle to insure that once the servo stops moving, the throttle is at the exact end of the travel movement. I can post that again, if you would like.
CGr.
I don't think the servo is trying to push to far. I adjust my throttle setup as follows:
I open up my throttle to wide open on the Tx so that the servo goes the full travel and I open up the carb to where it is suppose to be when fully opened, then I tigthen the pushrod onto the servo and close it at the Tx - usually I then adjust my end points on the servo so that when I'm "closed" it will only travel to that point and not further. I will have a look into the ball-socket. Thank you