I picked up a used "project" boat, nice trailer and it had an 85hp Evinrude (1970's) on it. I am using the correct gas/2-cycle mixture, checked lower unit and looks fine, the engine will turn over but won't start. It seems like there is a leak where the fuel line connects to the fuel filter. Any suggestions on how to test the engine to see if it will start? One person suggested started fluid spray? Cherndog