Sad news on the older 562. New ring , rebuilt carb, past pressure and vacuum test. Today I took it to a spot where I could do some big logs to attempt to do a reset on the computer. I ran it for about three minutes ripping a big log lengthwise with a 20 inch bar. When I was finished, I let go of the throttle in the saw died and would not restart it home. Let it cooled off won’t restart. I pulled the muffler and it looks like the piston is scored. I think I may give up on this saw I have another newer one that I still need to rebuild the carbon as well , at least I know how to rebuild the car and get it in and out. By the way, as far as I can tell this one just seems to have two oiler positions. Maybe that’s just the detent.