I almost found out the hard way that fuel tubing for gasoline is a lot less forgiving than that for glow fuel.

I did the plumbing in my new MW Extra 300 using the black gas tubing that came in a "gas conversion package" complete with s/s tying wires, and all worked well for awhile.

A few months later, I fire up the engine at the field for a flight and notice that the engine is running erratically. Finally, after several attempts to get it running properly without success I call it a day and pack up.

Back home I inspect the fuel system , only to find that the black tubing in the tank has split along it's seam and the clunk is rolling around in the tank. Moral of the story....use only the best tubing available for gasoline.