[40 Deluxe]

Really, if the fuel line is indeed serving as a ground circuit, how could it possibly get hot enough to cause vapor lock?! Ignition draw is not likely to be over 5 amps or so; the generator may be charging at the rate of 10-15 amps; hitting the brakes may momentarily draw another 5 or so amps for the stoplight. NOT enough to even slightly warm that gas line! There's more metal in that line than in the wire that feeds the entire electrical system (other than starter)!