Disconnect the spark plug wire as a safety precaution. Pull the wire off with your fingers.
Remove the belt cover hex screws with a hex screwdriver. Gently pull off the belt cover with your fingers if necessary.
Grasp the old belt with your fingers near the bottom of the auger pulley. Pull the belt off the pulley. Push down on the idler pulley with your fingers and remove the belt from the belt keeper. Release the idler pulley.
Push down on the idler pulley with your fingers and install the new belt on top of the auger pulley and under the belt keeper. Release the idler pulley.
Wrap the belt around the engine pulley and back under the auger pulley. Make sure the belt is centered on each pulley.
Install the belt cover by pushing it gently on with your fingers. Insert the hex screws and tighten with a hex screwdriver to secure the belt cover.
Connect the spark plug wire by pushing it over the spark plug.