Originally posted by davey_flyer
I was breaking in my engine today on my UCD (OS91FS) and noticed that at low throttle (idle) it seems to shake the rear feathers quite a bit - is this normal? I wonder if this has anything to do with the stab breaking off on some people? Could the shaking be due to the long moment? Is it something to worry about?
Thx
It's quite normal for a new engine to vibrate more but after you run 1-2 gallons through it, it should stabilize, especially for OS which typically does not need so much run-in. Alternatively you could use an engine stand first for break-in, then transfer it to the plane when things are smoother. Good luck..............