Thanks Chairman for the info. Here is some history of what happened. My son was mowing our lawn. He backed into some bushes, as he pulled out, the bush pulled the positive wire from the fuel Solenoid and the lawn tractor stopped. I replaced the wiring harness for the fuel solenoid and still the lawn tractor would not start. I then replaced the fuel solenoid with a new one and still not starting. I got frustrated, and cut the plunger of the old fuel solenoid, thinking of bypassing the fuel solenoid all together to see if t would start and it didn't. So I'm thinking there may be another issue. I will check the spark plugs as you suggested and all the safety switches. Not sure what else it could be?