CAN SOMEONE HELP ME? MY 67 JOHNSON IS FOULING 1 PLUG. THE THING RUNS FOR A FEW MINUTES THEN GOES TO ONE CYLINDER. IF I SWAP OUT THE TOP PLUG FOR THE BOTTOM ONE IT WILL RUN FOR A FEW THEN FOUL THAT ONE THEN YOU CAN SWAP THEM BACK AND BACK TO RUNNING AGAIN, THE CARBS HAVE BEEN CLEANED AND NEW...
