Hello: Was wondering if anyone had experienced this senario. My 853 intermittenly will starve for fuel. It will actually collapse the priming bulb trying to get fuel. I've replaced the fuel lines, the line in the tank and the strainer/check valve in the tank. I've pulled out all the lines from the tank and put them in a 5 gal. container of fuel and it will do the same thing. If you play with water seperator on the fuel filter sometimes it will seem to help....any ideas as to what to look for? Thanks, Jeff