I have a 70 Series Cub Cadet riding mower, and for some reason it just stop running. I was wondering if anyone has any clue, and if anyone has a wiring schematic for this type of model. I believe that it is about a 62 to a 64. I did notice that when it finally stop running a puff of white smoke came from the muffler. I am wondering if its that ethanol fuel we have now. Please help it is a good mower and was running fine until now.