I bleed the fuel filters after changing them, but nothing else needs it. That said, I came home to a pair of fully charged batteries & turned the power on the Deuce. Fuel is flowing back into the tank, so that pump is working fine as I thought. 10 minutes of the pump running & I decided to spin her up & see if she would fire off. Three 20 second tries & no start or even popping going on. This makes me wonder what is up with this engine.