Starting a lawn mower takes some effort when pulling on the starter rope. This thin rope takes a lot of abuse, as it's jerked often and left to weather in the sun. It's likely to snap eventually, warranting replacement. You can perform this repair at home, without the cost of a service call or days away from your mower.
Remove the sparkplug wire from the sparkplug. This prevents the mower from an accidental start, ensuring your safety as you work with the engine. Unscrew the screws holding the starter housing in place, using a screwdriver. Remove the plastic starter housing and turn over. Remove the old worn rope from the starter pulley, inside the starter housing.
Measure and cut a new rope for the mower to a length of 10 feet, using a tape measure and a knife. Place the end of the rope through the starter pulley. Knot the end of the rope and secure the frayed ends with electrical tape.
Wrap the rope around the starter pulley twice and thread the rope through the hole on the starter housing, pushing the end through to the outside. Replace the starter housing on top of the engine and screw into place with the removed screws.
Pull the newly installed rope through the hole on the mower handle and pull, placing tension in the rope. Attach the rope to the handle at a comfortable height.
Attach the handle to the pull cord at a comfortable level, leaving some tension on the rope. Push the end of the rope through the middle of the handle and squeeze the staple onto the rope with pliers. Trim the excess rope from the handle and discard.
Reattach the sparkplug wire and start the engine.