Self-propelled Honda lawn mowers use a belt and pulley to help drive the mower, making it easier to mow the lawn. Over time, the belt can stretch and start to slip. Fortunately there is a tension screw to put more tension on the belt and make it snug again, eliminating the need to replace the belt. Doing the job yourself saves you the time and money it would take to use a repair shop.
Remove the grass clipping collector bag from the mower. Disconnect the spark plug wire from the spark plug and secure it away from the spark plug.
Use the screwdriver to remove the belt housing on the mower deck. This housing is located near the rear wheels. Remove the screws and set the housing to the side.
Locate the screw on the transmission pulley wheel. Insert the screwdriver into the screw and turn it clockwise to create more tension on the belt. The belt needs to be tight enough to stay on the pulley and not slip, while not so tight that the pulley no longer turns. Test the tension by carefully moving the belt through the pulley. Keep your fingers away from the pulley.
Replace the housing onto the rear of the mower. Reattach the spark plug wire to the spark plug.