Ok, got a question an I'm no good with electrical stuff. A guy brought me a john deere trailfire to see if I can get it going again. The key would shock him as he shut the sled off, so he puts a new switch in. By the way, it has electric start. The switch was replaced with the wrong one and would start turning over as soon as the key was turned on, not to "start". We replaced the switch with the correct one and now it has virtually no spark. It looks like when the engine turns over it will spark once or three times and lose it. I have no idea how to check the coil, but in my mind, its the only thing it could be. It has a cdi box, and I always thought that it worked or it didnt. I have seen alot of things, but this is weird.