I'm in the middle of breaking in a new 5.9. I ran a tank 2 weeks ago. Drained the tank then went on vacation. Now it won't start. Glow plug is good. It appears that no fuel is flowing through the line. I can see bubbles not moving. But Once I pull the hose off of the carb fuel comes freely out of the hose. Seems that the carb is plugging up the flow. I guess I should try cleaning out the carb?