Re: OMC Outboard Tank 5/16" Fuel Line Hose

[amuller]

I incline to the view that any hose with a thin membrane liner is likely to be problematic eventually. The EPA is concerned primarily with permeation, and the Coast Guard with fire resistance. But is it realistic to expect that the liner will stay in place permanently when the hose is left out in the sun, kinked, squashed under the rim of a portable, tank, etc?
Can regular hose allow enough permeation to create a flammable atmosphere in the bilge? I’m thinking of my Crestliner with the bow tank. There would be on the order of 20 feet of line between the tank and the motor. The space is made to be ventilated under way but because it’s an outboard there is no blower, per usual. Perhaps it would be better to use copper or aluminum lines with hose sections at the ends?