Installing the Indigo electronic ignition conversion kit will significantly improve the starting and running of your engine. In addition, if you install their fresh water cooling conversion you will greatly increase the life of your engine and resolve the overheating problems that plague so many Atomic-4 engines. I was so impressed with these conversions that I also put in the Indigo crankcase vent line, and now the atmosphere in the engine room of my boat is smoke-free.