[satoys]

The spiderbox engine it came with was apart, wires hanging loose, not in good shape. I replaced it with another one, and this is my "test" engine, on a workbench. I finally got it back together, got it running, and learned a lot ! But, as my luck runs, next time I went out, it would not start. Traced it out, started getting voltage, so was going to take the starter off to test. For some reason it twisted, and broke the crankcase at the starter. (pic 1) and of course the starter worked fine on the floor.
First question is - any way JBweld would fix this, or waste of time ?
Second question - I decided to take the stator off, and reuse the right side of the crankcase since my oil drain plug is stripped on the other (running) engine.
Sense these seem so brittle, how do I get the right crankcase side off without cracking it ? (pic 2)