Hi all, I have a 2001 50" Dixie with a 19hp Kawasaki. It starts and idles fine and does fine all the way to fast idle, when you start to move the machine(make jerky movements) it tries to die out, then picks back up. It pops under the air filter as well. The air filter is brand new, new fuel filter, the entire fuel system has been dumped out and cleaned. Carb has been completely cleaned and soaked. I also tried another carb that I had, still does the same thing. I have read a couple of other post on here about the fuel tank cap, I bought new caps because the old ones were letting water into the tank. The new ones have vent screws on the top, they are out, I will try to take the caps loose tomorrow to see if that helps. Any help would be greatly appreciated, I need to sell this mower soon.