Ive gone over the fuel system on my Airborn tank to carb. The tanks sqweeky clean, the fuel line & prime bulb are new & the line from pump to carb is the same new.. Pep Boys fuel line. The Oil Im using dyes the gas a dark blue-ish green. Problem is the 1st cup or so comes out brown then its blue again. It almost looks like rust & the only ferrous metal there is the pump housing that is rusted outside but clean inside. [I will replace that with an aluminum one] Could it be that the fuel line is coloring the gas? Its the only part I havent used long term except the primer ball. Thanks.
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