The problem is not the Walbro or the fuel, it's the way the user adjusts the needle valves..An engine can be converted to glow fuel by drilling all the fuel passages to twice the area used for gas..You will now require twice as much $20 a gallon fuel as you use now...
I got 600 more rpm from a G26 using glow fuel, from 9000 to 9600...
And the engine WILL stop if the glow plug goes bad from running the engine just as lean as it was run with gas...