I get my boat filled on the doc and if i do not use the boat right away then the fuel will come up through the vents and leak down the side of the boat. I went on vacation for a weak and this is what i came home to. I am having the paint fixed over the winter but want to make sure this does not happen again, any ideas?

That stinks. Try not topping it off. Anytime it get warm with a full tank its going to use the overflow.

Thanks I have mention that to my fuel guy he says he is not but who the hell knows

To be safe, you can put a clear piece of vinyl under the overflow. Then you can always remove the vinyl for poker runs and such.

Chances are you are getting a small amount of fuel in the vent tube. When the temps change, the fuel and air in the tank expands and pushes out the fuel in the vent tube.
I have seen a gadget that acts as a catch can. It is temporary and attaches with suction cups.

Face it....it's K-Dogs fault!!!

...or maybe you could try this.

http://www.boatersworld.com/product/366790038.htm

I can't find the link to the suction cup overflow bottles, but that could work as well.

maybe "old" is wiser thanks Old school i'll look into it

Your fuel guy is a F@#ing Idiot!!!!!!!!!! When you get home tonight tell Kevin I said Hi....

Fuel expands.

It is cold in the ground, then the boat and tank heat up.

Just do not fill up until you are going to use the boat. Otherwise don't fill it completely full if you are going to store it.

On Diesel they say to only fill 90% full. I don't think gasoline expands as much.