The gas in my tank is from the previous owner and is probably about 2 years old now. Quick Google search said gas is fresh for about 6 month. The engine started right up and seemed to run fine when I last started it 4 months ago, but I'd like to drain the fuel system and start over with fresh gas before I start the engine again. Is there a way to trick the fuel pump into running so I can pump the old gas into a jug?