Originally posted by rajul
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..............
I have to aggree. I just broke in a new OS91 pumper and after 3 tank fulls, it already runs smoother and idles much better.
On another note, I just finished my UCD3D and had it out at the field today. Did the typical radio check and stuff and noticed quite a bit of jitter in all servos when only 6-7 feet with antenna down. Well,... I figured I'd taxi around a little and a minute into it, the plane went high throttle, full down elevator, pitching the prop into the ground! Well, low and behold, I noticed that I had mistakenly installed an older (but new looking) Futaba receiver that was in a wreck months ago. YIKES!
Hope to get a flight in soon,... with the new receiver!