Hi Rich,

Welcome to the 'glow club'

You have the same engine, and mine runs on glow just fine (even better than with spark). I also tried to run my Poulan with increased compression (like your engine). And it runs even better.

I know, you cut ports so it is not the same any more, but I don't think it may affect the quality of running. The only reason I suspect is the glow plug. It if glows it should ignite the mixture.

So for the first test power your plug and check if it has enough temperature. It should be light orange. It it's red, it is to cold. It it's yellow, it will not last long I noticed, that even the first coil is not bright it does not affect the running as long as the rest of the coil glows orange. When I had a weak battery and the coil was red, angine missed and run very rough.

The other thing could be the position of the glow plug. Mine is flush with the bottom of the spark plug (the end of the thread, not the electrode). I used demolished original spark plug for glow adapter, so as far as the original spark plug went, my glow goes the same.

The last thing may be the gasoline type. In California gasoline is so modified (CA Emmision). Who knows what they add to it. I don't think they do MTBE any more but for sure some detergents and other stuff. Maybe ethanol - who knows.
Anyway if you mix methanol with gasoline and at least you will be sure that 50% of the fuel is known.
I found adding nitro didn't help at all - I got strange pinging. But 50% methanol 50% gasoline plus 3% oil (it makes 103% all together ) and the engine run like a clockwatch. 50% methanol didn't affect the carb setting much but keeps glow plug hot even at 1700rpm idle.

RysiuM