RE: Saito 120 and 180 Throttle Arms
Hi Jim.....
I have a friend that uses these engines with those stupid ball links that stand off that wimpy plastic arm.
When the linkage moves it twists the arm causing backlash in the throttle linkage so that the idle cannot be accurately set and will return to the same place.
There is no binding anywhere. The same problem exists on servos that are used on flight control surfaces and the metal servo arm fixes it.