[macojoe]

Van My boat has a vented cap, it has a small line running next to the fill hose, that connects in the cap assembly, but I still get a little leakage when it starts getting warm out. I think that is just from expansion.

Could that be the only issue?
Can you just not "top %$%$%$%$, leaving a little room for expansion?

Thanks Van!
Yes it is all from expansion, and the fact that when the boat is tilted up it blocks the vent hole in the tank as the vent is in the rear of the tank.
The vented gas cap, does it only work when there is a hose from the tank to the cap, or does it vent its self?
I agree drilling the tank os not the thing to do!

Putting another vent in is just going to make the problem worse! You're best bet would be to just fill the tank a little less so the gas level doesn't reach the vent line.

Thanks Mike, Why would adding a 2nd vent be worse?? If I added one to the front it would not be blocked when boat is tilted allowing for it to vent, right?

I know that it being to full is the case, but even if I don't fill till it tops off and tilt the boat up it blocks the vent in the rear.
Why they ever vented it in the rear is beyond me!