Neither. You should simply make the same line from stainless hardline. Unlike a hose assembly, it's light, cheap, and will last forever.
Stainless can certainly work harden, but brittle, no. This is the perfect application for this. Same stuff the prop governor and fuel pump to servo lines are made out of on many factory Lycomings.
We have a design engineer at work who says to "use stainless only when everything else will work"...
Translation: stainless is good stuff.
Personally I would have ditched that monstronsity of a gascolator, it serves almost no purpose on a low wing and acts as a huge heat sink for your fuel.
Hi Walt,
Value your opinion. How would you ditch it? Just bypass it or put in a filter (what kind?) somewhere in line? The gascolator was in the plane when my wife bought it. When I first cleaned the gascolator, there was a lot of gunk and water in it so it did catch something. Since the first cleaning, I have seen nothing else. I am wondering what effect going from a O-320 to an O-360 and also moving the oil cooler from the front of the #2 cylinder to the back of the #4 cylinder is going to have on my cooling/potential for vapor lock. Will find out soon...