That last post reminded me - I had intermittent problems with mine that turned out to be debris in the plastic elbow on the bottom of the fuel tank. It couldn't make it past the 90 angle to travel on to the inline filter, and it wasn't visible looking down into tank. Finally took the tank off, turned it upside down, and blew it out with compressed air to solve the problem. The debris (sealant, gasket particles from cap seal, maybe) would move around and block (at least partially) the fuel flow at times. Might be worth removing the hose where it goes into filter, and blowing air back up into tank to see if any crap comes out. Simple check...