<I have been using a yellow tubing for sight gage and fuel lines in my LNC2
for the past four years and am very happy with it.Do any of you know more
about
this type of tubing?  Greg Nelson>

Greg-
The yellow-colored Tygon supplied by Lancair is F-4040. It is fuel rated and
almost every Lancair has some of it in their fuel system.
If you have a header tank and use it for a sight gauge, a fairly sharp 90
deg bend is required where the tube crosses through the instrument panel.
Insert two short springs in the tubing at the bend locations to keep it from
kinking or collapsing.
Bill Rumburg
N403WR  (Sonic bOOm)