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Old 09-22-2010, 10:27 AM
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Location: Shelby, OH
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Default RE: back pressure question

While I plumb my tanks exactly as John has suggested and there is no problem loosing fuel out the tank unless you stand the plane on its nose, Modern practice seems to be to wrap the tank vent line around the tank front to rear before going to the outlet position higher than the tank.

This way, if you stand the plane on its nose, no fuel comes out the vent. However it will still possibly come out the carb.