- Low engine oil: Insufficient engine oil can cause the engine to overheat and shut down as a safety precaution. Check the oil level and add more if necessary.
- Faulty ignition switch: A malfunctioning ignition switch can prevent the engine from receiving power when the key is turned. Try turning the key back and forth several times to see if it makes a difference.
- Loose or damaged wiring: Loose or damaged wiring can disrupt the electrical connection between the ignition switch, battery, and starter solenoid, preventing the engine from starting. Inspect the wiring for any loose connections or damage and repair or replace as needed.
- Faulty starter solenoid: A faulty starter solenoid may not engage the starter motor when the key is turned, preventing the engine from starting. Test the starter solenoid by bypassing it with a screwdriver to see if the engine cranks. If the engine cranks, replace the starter solenoid.
- Faulty safety switches: Lawn mower tractors are equipped with safety switches that shut down the engine if the operator leaves the seat or engages the parking brake. Ensure that the safety switches are functioning properly and are not causing the engine to shut down unintentionally.
- Transmission problems: If the transmission is not engaging properly, it can cause the engine to stall when the tractor is placed in gear. Check the transmission fluid level and add more if necessary. You may also need to adjust the transmission linkage or have it repaired if it is damaged.
* Brake switch: The brake switch is responsible for disengaging the starter when the brake pedal is depressed. If the brake switch is faulty, it may cause the engine to shut down when the brake is released.
