I had success by (prob unorthodox) screwing one of the screws that holds the bowls on into the place of the main jet (main jet holds the needle jet,emulsion tube, on so it must be removed to pull the needle jet). Once the screw is threaded into place, in place of the main jet, lightly tap the head of the screw with a mallet ( or handle of screwdriver as I did). Should help.