how could this possibly happen

[Blue_Heron]

Originally Posted by thedog

if you put a fuel vent cap over a boats vent. with a hose and fitting on it. pump water into a tank. fuel comes out of vent. fill up 40 or 50 gallons and then leave.

Seems a little far fetched to me. Water is heavier than gas, yes, but unless they brought along a fitting that made a tight seal with your deck fill, it would be a very slow messy process to capture gas pushed through a vent.

The water in the gas at the last fill up is unlikely, but I think more likely than the theft by water displacement scenario. Every time I've had water in my gas, it's been a problem with the tank. 12" is a bunch, though. Is your tank really 24"deep?
Dave