I believe they have a ventilation system, correct? or am I wrong... So as long as the pressure is zero in the tank and air can come in when fuel goes out it should be fine. Do modern plastic gas cans (just average ones in the stores) have this pressure equalization mechanism built in the cap?
Anonymous
If you can pump gas at the right pressure to the engine it will run.
River Euphrates
Extremely dangerous.
The only thing you should use as a fuel tank is a properly designed (and installed) fuel tank or fuel cell.
Trump 2020
You can't legally do that. Forget it.
Grandpa Jack
It's been a long time since you could buy the portable red gas cans with the little yellow vent on them. Modern gas cans have no separate vent - they "vent" through the spout by design when the gas is being poured out. So no, you wouldn't be able to use a portable can as a primary container and pump fuel out of it without modifying it. And do not modify a portable can! Just spend the money and buy a tank that was designed specifically to have fuel pumped out of it as a primary tank instead.
?
No, that would be dangerous when carrying it around in the car, truck or whatever as fumes and indeed fuel itself can escape into the car. Those intended as outboard fuel tanks, though, do have an air admittance which you'd have to screw open before use in the boat.