AIR PILOT BLEED IS BLOCKED, WILL EITHER BE UNDER A CROSS HEAD SCREW ON TOP THE CARB, REMOVE THE IDLE SPEED SCREW FIRST OR A BLACK PUSH IN JET AGAIN REMOVE THE IDLE SPEED SCREW FIRST TO BE ABLE TO REMOVE IT. IT HAS A VERY TINY HOLE IN IT USE CARB CLEANER AND AIRLINE TO CLEAN IT OUT.