ORIGINAL: nonstoprc
Sounds like a leaked gas tank inside the airplane can allow vapors to accumulate inside the fuse and be ignited by on-board power switches, if the switches are not sealed.
I have been using electric pump for glow fuel and never have a problem.
nonstoprc;
You are absolutely correct. It could happen. If all factors are in favor of an ignition an explosion could result. Luckily there is a very slim chance of an electrical spark inside the fuse unless you unplug a battery. There also needs to be an accummulation of gasoline vapors inside the fuse, that cannot escape. If there wouldn't be an elevated risk with gas engines, why would we need to have a fire extinquisher handy?