RCU Forums - Ys 140 DZ Idle problem

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Ys 140 DZ Idle problem

Hello Dave,
I have a problem with my DZ.
My engine will not idle down after a few minutes in flight, on the ground it idles fine and I can cut the throttle fine with my transmitter.
But once its up in the air I need to move my throttle trim to closed and hold my throttle cut switch on for at least 45 sec before it will idle slow enough that I can land, even then it doesn't shut off till about 10 secs pass.
I thought I might have a lean Idle and turned in the regulator some, but that did not help.
Can the engine be sucking air from somewhere when it gets hot and expands??

Thanks,

John.

RE: Ys 140 DZ Idle problem

It sounds like something is leaking. Pull the engine and make sure all the bolts are tight.