I have an Eliminator Whaler with a 502 engine with a Mallory Ignition system in the boat. The problem I am having is that the boat starts to miss at about 3000 RPM through 4800 RPM. I am thinking of replacing the ignition system because the ignition sometime just quits and there is just no spark. I have check all the fuses and breakers everything looks good. What type of ignition systems are you guys using in your jet boats and what problems have you had, if any? This problem just puzzles me. HELP!!!