I am building a Sig 4 Star 60 and am almost finished. I just connected the throttle cable to the throttle barrel on the engine and the cable runs freely.

When using my radio to advance and retard the throttle, it works just fine.

At throttle closed position and throttle wide open position, I get a buzzing from the servo that can be stopped by slightly advancing or retarding the throttle on the radio.

Throttle cut works fine but also buzzes when on.

Cable is not impinging and runs freely.

Am I worrying about nothing?

Make sure the carb arm isn't being over driven.

It is not being over driven, I checked for that...thanks.

Then if there is no excessive binding. I'm guessing it's just the servos singing finding center and correcting. Business as usuall.

Some servos will sing to you just by adding the weight of a control rod, any bind at all even if it really isn't binding. Not a big deal, just the nature of the beast.

Thanks you guys.