Still a mystery.
I got a bit over 100 for the compression. Stihl says 90 to 110 for their saws...
I'm going to try just removing the carb, getting the carb, and fuel lines all cleaned up. And then some fresh gas.
On edit.
Clamped the throttle open, then cranked it a bunch of times.... And got 125. So it may be a little high, even. But I've seen a bunch of guys saying 120-125 is normal. So I'll go with it.
Got the saw running. It ran a little while, then died, when it got warm.
Looks like I need to figure out a way to keep the throttle open, when I am cranking, to get it started.
Going to work on fuel delivery, and putting in fresh fuel. as I suggested to myself earlier. But having to keep the throttle open, suggests too much fuel. And that leads to the other things.
Seems to me the carb is badly out of adjustment. And it is spitting out bar oil like there's no tomorrow.
Time for me to stop bothering a truck forum thread with chainsaw business. ...
Please don't stop. I'm learning small engines now finally, so any tidbits of troubleshooting I can pick up if needed later is welcome! I have a lot to learn!