"Eric Miller" wrote in message
...
| "C J Campbell" wrote in message
| ...
| Don't fill your plane before putting it away?
|
| We turn the fuel valve off or turn it to left or right tank -- this
seems
| to
| mitigate the problem considerably, though I am not sure why it does
this.
|
| Because in any position besides the BOTH setting, it prevents fuel from
| flowing between the tanks... or more precisely, from the (slightly) upper
| tank to the lower tank and out the lower tank's fuel vent.
|

Okay, that much I knew, but why doesn't the lower tank just empty itself?
Does it need the pressure from the higher tank in order to start siphoning
out the fuel vent?