Howdy all. I had no spark and checked the coils and plug wires and they were fine. Out of desperation I cut the black wire with the yellow stripe on the side of the engine and the engine started. I had to pull the plug wires to kill the engine. I just do not know what needs to be replaced to cure my problem. I'm thinking maybe the ignition switch but I'm guessing it could also be something else. Any help would be greatly appreciated.