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Tohatsu brand gas tanks has a vent on the cap just loosen it and it vents no problem. As far a portable fuel cans I use the six gallon racing fuel jugs like jegs and summit racing sells they are heavy duty with a big vent cap and a 3/4 inch clear tube on top so you can see whats going on, only way to go. You guys are buying crap for tanks and fuel jugs. Try the square 6 gal racing plastic heavy duty fuel jug you wont ever be with out one again.
