Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Seat switch or the brake switch are two items that can keep the starter from engaging. Or a bad key switch. Do you have a voltmeter or test light to see if there is battery voltage to the starter solenoid when key is turned to start?
If there is battery voltage going to the switch terminal on the starter solenoid, the solenoid may be bad. It is what has to engage the starter.