I have a 88 70hp Evinrude that doesn't seem to be drawing fuel. The motor will idle then dies on me unless i pump the primer ball again gut will die again. It doesn't seem to be getting any fuel to me. The fuel tank vent is clear and i had all the fuel hoses replaced recently. I had a mechanic rebuild the carbs and disconect the VRO pump last year and the motor would never stay running since. Anybody have any ideas what could be causing this?