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As I continue to research the issue of my nose tank
occasionally venting fuel while at idle, I followed the routing of the overflow
line under the panel and down the left side just forward of the seat. I
found that the line has been formed into a fairly large "S" prior to ending at
the fitting on the left tank. This "S" creates a trap similar to a sink
drain. Why is this trap bent into the overflow line? What purpose
does it serve? I would appear that it creates considerable resistance in
the fuel trying to enter the overflow line and return to the wing tank.
Also, I can imagine that over the years it may have become partially clogged
with sediment and whatever. Tomorrow I will remove the line and clean it
out completely. Hopefully it will then permit a better return of the
overflow fuel. However, any thoughts on this or experiences
with it are appreciated. Thanks...Roger
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