"JohnH" wrote in message
...
On Wed, 18 Oct 2006 09:15:34 -0400, "Eisboch" wrote:


JohnH wrote:

Not a good idea to top off. Always leave some room for expansion.
(Based
on
experience!)


Vapors expand and contract a lot. Liquid fuel expands a very little.
Built-in gas tanks in boats are vented. There will be more absorbtion of
water vapor during the vapor expansion/contraction cycles than with the
tank
full of fuel.

That's what I think.

Eisboch


Well, when the fuel leaks out the vent and takes off the decals on the
side
of the boat, you'll understand why completely filling the tank is not a
good idea. :)


Nobody is talking about *completely* filling up the tank John.