Tinkered with this one a little today since the poulan 2 man still isn't cooperating. I thought that the rusted solid chain was keeping this one from turning, but that wasn't the case. After I pried the chain off the bar, it still wouldn't turn. I decided to work on the chain, so I sprayed it down with a 50/50 mix of acetone and ATF. I worked the chain by hand for an hour or so and except for 9-10 links that are still being stubborn, it moves like new again.
Anyway, I pulled the recoil assembly and found the flywheel jammed against the housing by dirt dauber nests. I cleaned those out and she spins freely. The piston and cylinder look good. The only real problem I found was that the lower ring appears to be stuck in the groove. I'm not the sharpest tool in the shed, but I don't think the ring gaps should be in line either and they are. No big deal I guess, it's all going to come apart for new bearings/seals/gaskets/paint anyway.