Well I think the problem with the burnt fuel line is solved. I have been using a hanger 9 beam engine mount on the evo 26 and a bisson pitts style muffler. With the muffler attached to the engine the side of the muffler is resting on the side of the engine mount and not letting the muffler sit square on the engine, thus letting gases out right over the fuel line. I think the combination of the hot muffler and the exhaust leak may have caused the problem with the fuel line burning through. I will be using neoprene and a radial mount on the plane now that I know the muffler doesn't work with the beam mount.

Joel