Quote Originally Posted by canadianal
I agree with the copper line thought, as i was always told that it would get brittle and crack,but i know for a fact and have seen copper line on the fuel lines of my dads old tractors and they have run for thousands and thousands of hours.
just my own observation
You are correct in that many farmers used what was availble, and they didn't worry. You have to remember that a tractor trundles across a field at 10 miles an hour max. If you have a fire, you bail off and watch it burn. Try that on the New Jersey Turnpike on a nice Sunday afternoon in June after a car event. In NY State, it isn't legal - and if you have a problem, your insurance company will probably say - "Have a nice day sir, you are not covered".
Gasoline fires in engine compartments are not fun - the reason I gave up on single feed 4160 style Holley carbs.