Pto side bearing is spun in the case on my 064. I've heard of lots of these short case saws spinning that bearing but this is only the 2nd one I've seen do it.
The old saw is actually a 066,I had 2 cylinder bolts holes stripped on the original 064 case so I changed it over to 066 cases but most would never noticed.
I have had that saw since new and have all the original parts still but the only original parts on it now is the crankshaft, fuel tank,recoil and flywheel.
I already changed the case but it was my last good pto side short case half. I need to get more but good ones are becoming scarce.