[ccjohnson]

Possibly an air pocket in fuel line run. If so, the air pocket collects in the high spots of the fuel line run. I had to pressurize my tank and bleed about a gallon of fuel out at primary filter on engine to fix mine when I got air in the fuel line. You will still need to figure out how air got in the lines if that is the problem. I had opened drain cock on my fuel / water separator while Detroit was running to get fuel to prime generator fuel filter. I WILL NEVER do that again!