Hi there I know this is an old thread but i have just finished setting up my new 90 se and i had the same problem but with the other end of the throttle range.
I could not get it to start with the revs low enough to stop it killing me or the clutch. i could sort out the engine cut either. answer was i had the throttle trim on full and had not noticed the setting on the screen. It cost me a bruise on my ribs where the boom hit me, was starting it on the bench, and a new clutch liner and clutch bell. i have not had it in the air yet and i am stripping it to repair already. lol. hope this helps you.
