Hi Tim,
For several years I left my mono parked outside throughout each year, only
protected
---From the Scottish weather by fabric covers (pyjamas). They got wet during
prolonged days of rain and although I have a few osmosis paint blisters to show
for such cruelty, I never had problems with water in fuel. This could be because
I always filled the tank to the brim, leaving no space in the tank for
moist air to be drawn in and condense.
The other factor in those days was that the mogas fuel had no ethanol in it,
which
absorbs water and might also be a feedstock for certain types of growth.
Coincidentally
and only a few months after I managed to get a hangar space, ethanol
started to appear in our mogas, which might have given me similar problems
to yours if I'd remained parked outside.
The course finger filters at the bottom of my fuel tank are made from brass.
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http://forums.matronics.com/viewtopic.php?p=473746#473746
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