How to Fix a Tiller Pulley

Turn off the tiller and move it to a flat and level location where you will have room to work freely, such as in a garage or on a driveway. Remove the key from the ignition.

Pull the spark plug wire off of the spark plug to prevent the engine from starting while you are working. Grasp the rubber boot at the top of the spark plug and pull it straight up and off.

Move the gear knob for the tiller to the "neutral" position. This will disengage the drive belt for removal.

Push in on the middle portion of the belt between the upper and lower pulleys with your fingers. Use a wooden tool, such as an old cooking spoon, to slip the belt off of the pulleys.

Shift the gear into the "Forward" or "Till" setting. Slip the belt off the tiller drive socket.

Use a brush and soapy water to remove any dirt or debris from around the pulleys. Spin the pulleys with your hand and check that they spin cleanly and don't wobble. Tighten a loose pulley by using a socket wrench to secure the pulley bolt to the manufacturer's specifications.

Replace a bent or broken pulley by loosening the pulley bolt. Pull the pulley off the hub. Apply the recommended grease or lubricant from your manufacturer to the inside of the pulley wheel and slip back over the hub. Tighten the pulley bolt to the recommendations given by the manufacturer.

Replace the belt over the drive socket. Shift the tiller into neutral and use the wooden tool to slip the belt into place. Reconnect the spark plug wire.