I have a 2009 TRX 420 with no spark. The problem started with a misfire and eventually the engine would quit but start right up again but still misfire as verified by spark tester. Thinking it was a coil problem I took a spare coil I had from a 2001 Honda TRX 350 and installed it. It started , ran for a few seconds then quit with no power to the switch or panel. Found the Ignition 10 amp fuse was blown, so replaced it and removed the 2001 coil and reconnected the existing coil on the machine. Now I have no spark at all as verified by tester. Have battery voltage at the coil terminals when the key is on but no spark. What did i damage by trying the 2001 coil on this machine ? Could I have damaged the ECM or some other electrical component ?