RE: gas fuel with glo plug no ignition
Commander,
The WT-499 is just a Walbro pumper with larger passages for glow fuel and has an 11mm venturi. You can use a standard Walbro 11mm carb for gas glow. The 499 may run a little rich if you can't close the needles enough. The 499 would be nice to have around for experimenting.
Dave