OK Denny, looks good. Now I'll show you mine.
Here is the leak-down tester I made to diagnose a problem in the engine I rebuilt for my 1937 John Deere Model B tractor. I used an old sparkplug as an adapter. Turns out the plug shell (after busting out the porcelain) was exactly the right size to tap for the pipe. Lucked out.
After all this discussion, I'm going to make an adapter for my stovebolt engine too. Anyway, thought this might be of interest.
Leak down tester Kurt
