Allen,
Flame lickers are notorious for not running if the flame isn't near the ideal spot.
I did try my double one with propane butane gas by making two basic tiny blowtorches that connected to a bottle.
Unfortunately, I didn't quick get the air/fuel mixture quite right, and even though the licker ran well, the carbon in the flame gummed up the cylinders very quickly, after about ten minutes running.
I just then converted it over to meths and it ran great once the sweet spots were found (that is the really hard thing on some lickers).
Twin cylinder running on meths
[ame]https://www.youtube.com/watch?v=IyrWRBoC-2c&spfreload=10[/ame]
This is a single cylinder running on gas with a correct home made burner.
[ame]https://www.youtube.com/watch?v=Mi_T60n52jg&spfreload=10[/ame]
The flame should be very soft otherwise it will quickly overheat the cylinder.
[ame]https://www.youtube.com/watch?v=pVVXJz_2_E8&spfreload=10[/ame]
John