Rodney, Im using pure gasoline - no kind of alcohol in it. So walbro will work fine with it. Also Ive already managed to dial in the glow carb with gasoline - its at a much leaner position than any glow Ive run yet. about 3/4 turns from closed! but it sings nicely. The silicone parts (backplate gasket, needle valve o-ring and carb mount o-ring is not in direct full time contact with gasoline. and they seem pretty tough even after an hour of run time plus a week of just sitting with gas deposit inside the engine. If I can find a suitable replacement for them, I will change them anyway. So far no problems.

I will put up a video next week on youtube if i can manage to take a recording of the engine running on gasoline with glow carb.