Park your lawn tractor on a flat, level surface and turn off the engine.
Disconnect the spark plug wire from the spark plug. This is a safety precaution to prevent the engine from starting while you are working on it.
Locate the solenoid. On most lawn tractors, the solenoid is mounted on the starter motor.
Disconnect the electrical wires from the solenoid.
Use a multimeter to test the solenoid. Set the multimeter to volts.
Connect the positive probe of the multimeter to the positive terminal of the solenoid.
Connect the negative probe of the multimeter to the negative terminal of the solenoid.
Turn on the ignition key. The multimeter should read 12 volts.
If the multimeter does not read 12 volts, the solenoid is faulty and needs to be replaced.
Reconnect the electrical wires to the solenoid.
Reconnect the spark plug wire to the spark plug.
Start the lawn tractor and test it to make sure that it is working properly.
