How to replace the seat switch on a riding lawn mower

This DIY riding mower repair guide gives step-by-step instructions for replacing the seat switch on most riding lawn mowers. The seat switch is a safety device that shuts off the engine if it doesn't detect someone in the seat when the tractor starts moving. If the seat switch breaks, it won’t sense that you’re in the seat and will stop the engine when you release the brake. Replace a broken seat switch on your lawn tractor with a manufacturer-approved riding lawn mower part if it's defective.

Use this repair procedure to replace the seat switch in Craftsman, MTD, Troybilt, Husqvarna, Murray, Snapper, Cub Cadet and Ariens lawn tractors and riding mowers.

If you’re not sure the seat switch is the problem, follow the steps in this troubleshooting video to test the seat switch.

Instructions

1. Disconnect the battery

Park the tractor on a level surface and set the parking brake.

Turn the ignition switch off and remove the key.

Wear work gloves to protect your hands.

Lift the seat.

Remove the bolt connecting the negative cable to the battery and tuck the cable away from the battery so it doesn't touch the battery post.

2. Remove the seat

Remove the retaining bolt and washer from the seat bottom.

Press the seat adjustment lever and slide the seat fully forward.

Release the locking tab and pull the seat off the bracket while supporting the seat adjustment lever.

Remove the seat adjustment lever.

3. Remove the old seat switch

Disconnect the wire harness from the seat switch.

Rotate the seat switch counterclockwise to release it and pull it off the seat.

4. Install the new seat switch

Push the new seat switch into the seat bottom and rotate the switch clockwise to lock it in place.

Connect the wire harness to the switch.

5. Reinstall the seat

Reinstall the adjustment lever and support it while you snap the seat back into the bracket.

Reinstall the retaining bolt and washer.

6. Reconnect the battery

Reconnect the negative cable to the negative battery terminal.

Lower the seat.