ABV.... CGRetired offers a very good outline. I'll offer another method but it depends on the availability of the round blank servo disk (a substitute is the round wheels with holes) but if they are available , this method is the easiest way to adjust the throttle linkage to a servo on a basic radio. If using the white round wheels with holes, first paint the surface with a marks a lot pen.

1. Mount the servo, motor and throttle linkage and be sure that low throttle will kill the motor

2. Place a quick link on the throttle rod or cable

3. Place throttle in about the center position (doesn't have to be perfect)

4. Slide the quick link and tighten around the center point of the disk

5. Set throttle stick at low and run the trim all the way down

6. Pull or push the cable to fully low throttle and swipe the quick link pin across the surface of the disk to make and show an arc

7. Set the throttle stick on high and trim fully up

8. Pull or push the cable to wide open throttle and swipe an arc again on the disk

9. The two arcs will have a crossing point, at this point drill for the quick link connection

The servo now will just reach the endpoints of the linkage travel so will not bind and will allow the trim to kill the motor.