Quote:
Originally Posted by notanlines
What Brad said is not so. It is not vented where any fluid will leak OUT, only air would come in, as in a vacuum check valve. I've had this exact tank for more than three years and no leaks. And it is never turned off at the tank.
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Motorcycle mechanic here... venting equalizes air pressure inside and outside and the vent should NOT leak fuel IF the tank is NOT filled to the top on a hot day. On a hot day, fuel will expand in the tank and come out the vent if the tank is topped off. Think the spare tank in question will be the same. I do motorcycle carburetors and if a bowl vent is capped off, the carb floats go nuts and puke gas or won't allow flow. They sure won't work right with the vents plugged.