I pulled my plugs yesterday after a short run, brought the temp up to normal, ran it at 50-55mph and killed the ignition. I looked at the plugs and the #1 and #4 cylinder plugs were that nice brown color we are all looking for. The #2 and #3 cylinder plugs had some black powder carbon on them. Is this typical? I'm thinking maybe the valves on these two, 2 and 3 cylinders need adjusting. I'm not sure but I would think if it was the carb or the ignition system all of the plugs would look the same? Maybe I don't have a clue what I'm talking about?? Any input would be great. Thanks, Mack /ubbthreads/images/graemlins/cheers.gif