[rwairforce]

" evacuate the vapors and solder the holes"

Super suggestion, especially the evacuate part. The first one I ever fixed, I dumped the tank, cleaned it, filled it and dumped it with water about 3 times and when I hit it with the torch I about evacuated myself.
A real nice very surprising evacuation with flame assist occurred.
How do you properly evacuate a fuel tank before soldering?

Thanks. after the scare the fix went well.