- Brake adjustment: If the brake lever's adjustment is too tight, it can put pressure on the brake switch, causing it to disengage and turn off the engine. Check and adjust the brake lever's free play according to the manufacturer's recommendations.
- Worn or damaged brake switch: The brake switch may be damaged or worn out due to regular use. A faulty brake switch will not be able to sense the brake being engaged and will not allow the engine to run. Inspect the brake switch for any damage or corrosion, and replace it if necessary.
- Loose wire connections: Check the wire connections between the brake switch and the engine control module (ECM) or ignition switch to ensure that they are secure and not damaged. Loose or disconnected wires can disrupt the signal from the brake switch to the ECM, leading to engine shutdown.
- Faulty seat switch: Some Craftsman lawn tractors also have a seat switch that prevents the engine from running if the operator is not seated. Check the seat switch to ensure that it is functioning correctly.
- Engine safety features: Some Craftsman lawn tractors may have additional safety features that cause the engine to shut down if certain conditions are met. These features can include a low oil level sensor or a PTO (power take-off) engagement sensor. Check the tractor's owner's manual for more information on any additional safety features that may be present.
