I'm having trouble losing fuel pressure. When I pump the bulb it never feels right, stays mushy. I have replaced the fuel lines, connectors,and the pump bulb. I have tried a new tank and just rebuilt the fuel pump. I'm guessing something further up like the carbs are causing the problem. It seems to me that there has to be an air release somewhere in the carbs. If I take the fuel line off at the motor and pump the bulb with no connector, just open hose it pumps fuel through fast. If I leave the conector on it does nothing so with the end of the line open fuel goes through. It's like there is something plugged up somewhere. Anyone had any problems like this. The motor runs, starts right up but it will only run a few minutes then I have to pump the bulb every couple minutes before it starts to sputer then pump it up some more.