"Ken Davey" writes:

Bottom line - copper and vibration *can* lead to disaster.
I highly recommend 'fuel rated' tubing!

A similar thing happened on one of the BC Ferries boats a year or two
ago. These use big diesel engines for propulsion. There was a copper
line leading to a fuel pressure gauge that cracked due to work
hardening. It started spraying diesel fuel around, and some of it
landed on the exhaust manifold. Instant fire.

The crew managed to put out the fire with the CO2 extinguishing system,
and the boat was towed back to port with no loss of life. But it could
have been much worse.

Dave