I seem to remember somebody mentioning having a copper fuel line
break at one point. I don't remember if that person ever admitted if
they knew the trick to making copper survive as a fuel line (like in
a Model A or a farm tractor is to have a loop in it. The loop takes
up the vibration preventing the issue.
Or at least it has on my Super M for 60 years (hey, 60 years this
year as a matter of fact) but I'll hold out for another 60 before
I'm sure.
-Curt
Factory was steel tubing on A, B, C, H, and M. (and probably the
later Super series and eve on the x00 (400 for the M) ) I finally
replaced mine with copper last year because it was so hard to keep it
from leaking at the tank end (sediment bowl) and at the carburetor
end. I put a ball valve above the sediment bowl and a tank drain
too, since it sits around most of the time.
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