As a firefighter, I DO NOT recommend anybody try to put a flame any where near a gasoline engine or gasoline tank. This is a receipe for disaster. I've seem kids burned all over just from gasoline fumes from a goped.
Unclecrash, if you don't recommend this method, why do you even share it with us?!?!?!?!?!
Snakeboy, hang in there and keep taking advice from the guys who are in the know (XXX, JAW and few others). There is a lot of people's opinions and info here (some great, some might get you killed [

] ). Take the good with the bad and learn from the pros here.