Dave,
Thanks. Found the compression issue, which was once again my stupid mistake.
The third is cruves cast in the bore above the transfer ports.
I did not find curves above the transfer ports in my cylinder. Incidentally the internal cylinder temperature should be well above the 600 F limit of JB weld. It will be interesting to know what happens when you run it.
A standard electric starter doesn’t appear to be quite enough for the engine. It also does not appear that it can be hand started. However it will run but did not seem to make a lot of wind. The engine will turn 8100 RPM on a weed eater. At first run it turns 7200 RPM with a 16/8 MA, box stock carb, air box, filter and muffler.
Bill