The compression on both cylinders sounds good to me. Did you have this motor running yet, if not the cylinders are probably dried up from sitting. The next thing I would do, is take spark plugs out, pull starter rope and see if that makes a big difference , if not, squirt a little oil in each cylinder, see if that helps. Do you know if the other owner had crankcase apart? I put motors together and tightened bolts on crankcase covers and had trouble turning crankshaft before I had anything else on crankcase yet. I put a 2×4 on bottom of crank and tapped it with a dead blow hammer, which apparently straighten the crank into the crankcase. If that’s the case you will have to take powerhead off lower unit, may have to reseal cylinder case again,also you will get your chance to see what the rest looks like, that case you will know what you have. It sounds like a lot of work, but will be worth it when you are done.
