I have a 1985 merc 50 hp that starts fast and idles fine. It has started to miss a little when under power like its only hitting on half the cylinders. The moter is in excellent condition and does not appear to have been abused.Before I take it to the shop just wondered if anyone could give me an idea as to whether Im looking at a weak coil or coils,powerpack or fuel problem.I pulled the plugs and they appear to be in good condition.I can perform any tests recomended. Thanks for the help! Rusty 