"Jim Macklin" wrote

Fuel has weight, a little less than .5 pounds per foot of
distance. A high wing Cessna has about 3-4 feet between the
fuel tank and the carb float. The float in the bowl is
raised by the liquid fuel in the bowl and by a lever,
presses the needle valve closed, stopping the flow of fuel
by gravity.

I know how all of that stuff works, but using you figure, it the tank is 6"
overfilled, it is going to have an increase of pressure of 1/4 psi?

If that puppy is leaking because of that, I would still park it, wouldn't
you?

Stuff like that can get worse, and cause all kinds of problems that I would
rather deal with on the ground.
--
Jim in NC