Alan

OK, let me clarify about the plug gap. I think the recommended gap is more like .025 so it may be the right gap.

I ran into a situation on one of my engines where it would start and run the first flight of the day, but would not start on subsequent flights (tries). It would fire but not run, like it wasn't drawing fuel. But it would start and run OK if the plug gap was less than recommended. I suspect it was because I wasn't pushing the engine hard enough and the plug was oil fouling.
On a G38 I was using for sailplane towing, after the sailplane disconnected , I would do a steep dive for a 1000+ feet and land with the throttle closed. After that, it would fire
but not start without a lot of cranking. I suspected the plug was loading up in the long power-off dive. So I would then give it full throttle for a second on the down wind leg to clear the engine and never had the starting problem again.

Maybe If you find nothing else you could try closing the plug gap to see if things change.

Also, thanks for giving me a chance to tell a story. LOL.

Jerry