How to replace the starter motor on a riding lawn mower

This DIY repair guide shows how to replace the starter motor on a riding lawn mower. The starter motor spins the flywheel to start the engine when you turn the key. If you hear a click from the starter solenoid but the motor won't run, watch our riding mower troubleshooting video to confirm the problem. If the starter motor is faulty, replace it with a manufacturer-approved part.

Use this step-by-step guide and video to replace the starter motor on Craftsman, Husqvarna, MTD, Troy-Bilt, Murray, Poulan, Ariens, Snapper, and John Deere riding mowers and lawn tractors.

Instructions

1. Disconnect the battery

Let the engine cool.

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

Wear work gloves to protect your hands.

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

Turn the ignition switch off and remove the key.

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 engine blower housing

Lift the tractor hood.

Remove the air duct mounting screws and pull off the air duct.

Turn each air filter cover retaining knob counterclockwise and pull off the air filter cover.

Remove the air filter.

Remove the air filter housing screw.

Remove the front and rear blower housing mounting bolts and lift off the blower housing.

3. Remove the old starter motor

Remove the lower dash fastener and pull off the lower dash.

Remove the starter motor wire mounting nut and pull off the starter motor wire.

Remove the starter motor mounting bolts. A wire retainer comes off when you remove the left bolt.

Pull off the starter motor.

4. Install the new starter motor

Position the new starter motor on the engine and attach it with the right mounting bolt.

Position the wire retainer and the left bolt and then route the wires through the retainer. Install and tighten the left mounting bolt.

Attach the starter motor wire and connect it with the mounting nut.

Reinstall the lower dash and secure it with the fastener.

5. Reinstall the engine blower housing

Position the blower housing on the engine and align the air diverter in the housing.

Reinstall the blower housing mounting bolts.

Reinstall the air filter housing screw.

Reinstall the air filter and air filter cover.

Reinstall the air duct and attach it with the mounting screws.

Lower the tractor hood.

Tip: The rear blower housing bolts are longer than the front ones.

6. Reconnect the battery

Reconnect the negative cable to the negative battery terminal.

Lower the seat.