Don -
Thanks for your experience with Tygon tubing. I also have a Tygon tubing
sight gauge, mounted on the right side of my radio stack. After six years,
there's no sign of deterioration, other than some slight discoloration.
However, I do feel that all Tygon fuel tubing should be replaced after a set
number of years as a preventative maintenance. I'm just not sure how many!
Bill Rumburg
N403WR  (Sonic bOOm)  <Bill,
      I may be oversensitve about Tygon, but a Tygon sight gauge on my 235 became hard  , discolored and shrunk slightly in length in a couple years of

operation. Don Skeele>