Originally Posted by mattyo
Well, all I can say if based off what I've come across in the two engines I'm still in the process of rebuilding. Also my first rebuild. WEE! engine rebuild and more...
All my piston rings (in both engines) were loose and could do the hula-hoop thing you described. I would think that's the way it's supposed to be so the piston has some room to flex while the rings still keep a seal on the chamber. Take this with a grain of salt but I'm guessing your engine seize was from the locked rings. The rings could have dug into the chamber just enough to seize it up but with a little hands-on persuasion you were able to get it moving again? Not sure.
Let us know what you find.
Your thread is great! Exactly what I needed to start my own rebuild, so thank you very much. Looks like I have a long road ahead of me...are you close to finishing? Now that the pistons are out of the cylinders, I would think that I could turn the primary gear clockwise (if in fact, the cylinders were causing the problem), but it still won't budge. Do you think it could be a bearing? I'm 90% sure that I want to split the case so I can see what's inside, but right now I'm having trouble getting that dang nut off the clutch basket. I'll keep trying and let you know how it goes.