It's not the spring arm on the throttle that is causing my problem. I realize it helps return the throttle to idle or off when it is attached. If I take the spring arm off, still leaving it attached on the shaft, the throttle is then free. Only the servo then is responsible for closing the throttle since that tension is gone. But, the thickness of the spring on the shaft is what is holding the throttle rod and lever away from the carb body. If you put your thumb on the left side of the shaft (where my servo linkage is attached) and your index finger on the spring side, you can move it back and forth about 1/8 inch. When my engine sticks on high idle during my tests, I can push the rt. end of the shaft toward the carb which compresses the spring (which is now not attached to the lever but still on the shaft) and frees up the sticking and the throttle returns to normal idle. Should I install a nylon washer on the left side opposite the spring to keep the shaft shifted to the left? That is my question.