Have a tank model #53AH8CT6050 WITH THE 30HP Kohler ps-cv750. It will start and then shut right down as soon as I let off key. As long as I keep key turned in will run, kills power when I let off. It has power to carb, not fuel problem. I have checked safety switches in seat and handles. jumped them with a wire. Have changed ignition switch still same issue. It still will only runs as long as I keep key turned, seems to kill power to coils if I let off. Going back out to play around with it some more, have been looking for a shorted wire. I am stumped, What am I missing?