Here is the latest:
With outthe spark plug in the cylinder I can get a spark (when the prop is really moving). When I place a plug in the cylinder and rev up the prop - get nothing. The fatest method I have for spinning the prop is with an AC drill directly on the prop nut. When I tried a starter or rope, the RPMs drop even more.

I'm not sure this is helpful, but the compression seems quite high. Is it possible that my high compression is keeping me from getting the RPMs I need to get a spark? Any advice?

Thanks,

SB