Hello guys, I'm new to this sight and have a Honda problem. What i have is a gx140 that won't start. What I have done: new carb, new rings, laped valves, new spark plug, adjusted the valves, checked governor operation and adjusted. If you dump gas into the carb it will start and run great all day long, as soon as you shut it off it will not restart unless you dump gas in againe. Any ideas ?