It was very hard to get the piston with the ring back inside the cylinder. I tried oil and turning it and it din't want to go in. Finally it went in.

I have worked with many engines and will always try to get them off the stand as quick as possible but if there's excessive vibration or tuning problems you have to keep them on and running until they run properly.

This engine had too much vibration. When I took it off the stand the last time it was idling great and very smooth I don't know what happened to it sitting around.