Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Have you checked the two arm switches? If either switch hangs, you get no start. Use some wd40 on the switches and work the switches with the arms or flip them manually to see if one may be hanging.