Lawn mowers are a great tool for mowing the lawn, but all that pushing can become rather tiresome. One day, a genius thought up the concept of a self-driven push lawn mower, and garden maintenance was never the same. Although this was a blessing to all those with massive lawns, it did add an extra part that may need fixing. Over time, the lawn mower drive belt can become worn down and may snap. Replacing it every few seasons will prevent this.
Remove the spark plug wire from the spark plug to prevent the mower from starting while working on it.
Drain the gasoline and oil from the engine to prevent spilling.
Tilt the mower to the side with the carburetor above the fuel tank to prevent fuel from dripping into the carburetor.
Secure the mower blade against the block of wood and use the crescent wrench to loosen the bolt on the mower blade. Remove the blade. Screw the bolt back into place without the blade to keep the parts from falling out.
Unscrew the bolts from the drive belt cover and remove the cover.
Lift the belt off of the back pulley toward the rear of the mower and remove it.
Install a new drive belt, first putting the belt onto the front pulley and pulling it around the rear pulley. Replace all components and test the machine.