Thread: Full fuel tanks for the winter
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Richard Casady Richard Casady is offline
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First recorded activity by BoatBanter: May 2007
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Default Full fuel tanks for the winter
On Thu, 13 Nov 2008 06:34:37 -0500, wrote:

EMPTY tanks dont magically fill up with water because of a mysterious
'condensation process'. :-)

Oh, but they DO. Any variation in temperature of the air surrounding
the tank will cause a pumping action. Temp goes up, the air in the
tank expands and finds a way out to create equilibrium. Temp goes
down, the tank inhales air containing moisture.

In dry weather, the tank will breath dry air, and evaporate any water
that is there. Unless the tank is NOT empty and the fuel layer
prevents evaporation of the water. A teaspoon full is all it takes.

Unless of course you think your tank is completely pressure sealed, of
course.

why do the fuel caps on cars hiss at you when you open them, if they
are not sealed?

Casady
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