A broken pull string on a lawn mower can be a frustrating problem, but it’s one that’s relatively easy to fix. With a few simple tools and a little bit of time, you can have your mower up and running again in no time. In this article, we’ll walk you through the steps of how to replace the pull string on a lawn mower. We’ll also provide some tips on how to prevent the pull string from breaking in the future.

First, you’ll need to gather a few tools. You’ll need a new pull string, a pair of pliers, and a screwdriver. You may also need a small hammer or mallet. Once you have your tools, you can begin the repair process.

To start, remove the spark plug wire from the spark plug. This will help to prevent any electrical shocks while you’re working on the mower. Then remove the starter cover using the screwdriver or wrench. Once the starter cover is removed, you’ll be able to see the pull string and recoil spring. Use the pliers to grip the old pull string and pull it out of the recoil spring. Then, insert the new pull string into the recoil spring and pull it through until it’s about 6 inches long. Finally, reattach the starter cover and reconnect the spark plug wire.

To prevent the pull string from breaking in the future, avoid yanking on it too hard. Instead, pull it slowly and evenly. You should also lubricate the pull string regularly with a silicone-based lubricant. This will help to keep it from getting brittle and breaking. By following these tips, you can help to keep your lawn mower running smoothly for years to come.

Removing the Old Pull String

To remove the old pull string, follow these steps:

Locate the recoil spring cover on the side of the mower. This is typically a plastic or metal cover that is held in place by a few screws.
Remove the screws and lift off the recoil spring cover. You will now see the recoil spring, which is a coiled metal spring that is attached to the pull string.

Detaching the Pull String

To detach the pull string from the recoil spring, follow these steps:

Locate the knot or clip that is attaching the pull string to the recoil spring. Usually, the pull string is tied to a hook or a small metal clip on the recoil spring.
Cut the knot or unclip the clip to detach the pull string.
Carefully pull out the remaining length of the pull string from the recoil spring assembly.

Step	Description
1	Locate the knot or clip attaching the pull string to the recoil spring.
2	Cut the knot or unclip the clip to detach the pull string.
3	Carefully pull out the remaining length of the pull string from the recoil spring assembly.

How To Replace The Pull String On A Lawn Mower

Attaching the Pull Handle

1. Locate the pull handle assembly on the lawn mower engine. This is usually a plastic or metal housing with a spring-loaded cord inside.

2. Remove the screws that hold the pull handle assembly in place.

3. Pull the old pull cord out of the housing.

4. Insert the new pull cord into the housing.

5. Wind the pull cord around the spring-loaded spool inside the housing.

6. Pull the grip on the pull cord to make sure it is tensioned properly and does not slip when pulled. Adjust the tension of the spring by rotating the spool clockwise (to tighten) or counterclockwise (to loosen) until the desired tension is achieved. Here’s a detailed breakdown of the adjustment process:

Adjustment Direction	Effect on Tension
Clockwise	Tightens the tension
Counterclockwise	Loosens the tension

7. Reattach the pull handle assembly to the lawn mower engine. Make sure to tighten the screws securely.

8. Test the new pull cord by starting the lawn mower.

Adjusting the Pull Resistance

Once the pull string has been replaced, it’s important to adjust the pull resistance to ensure the mower starts easily and runs smoothly. Here’s a step-by-step guide to adjusting the pull resistance:

Locate the adjustment screw: Most lawn mowers have an adjustment screw located near the starter assembly. This screw controls the tension on the pull string.
Use a screwdriver or wrench: To adjust the screw, use a screwdriver or wrench that fits the head of the screw.
Turn the screw clockwise: To increase the pull resistance, turn the adjustment screw clockwise. This will tighten the spring and make the pull cord harder to pull.
Turn the screw counterclockwise: To decrease the pull resistance, turn the adjustment screw counterclockwise. This will loosen the spring and make the pull cord easier to pull.
Test the pull resistance: Once you have made an adjustment, pull the starter cord to test the pull resistance. If it’s too hard to pull, turn the screw counterclockwise slightly. If it’s too easy to pull, turn the screw clockwise slightly.

Additional Tips:

Start by making small adjustments to the screw. Over-tightening the screw can damage the starter assembly.
If you’re unsure how to adjust the pull resistance, consult your lawn mower’s user manual or contact the manufacturer.
Adjusting the pull resistance may take some trial and error. Be patient and make adjustments until you find the optimal pull resistance for your lawn mower.

Pull Resistance	Adjustment
Too Hard	Turn screw counterclockwise
Too Easy	Turn screw clockwise

Testing the New Pull Cord

After installing the new pull cord, it is essential to test it to ensure it is working correctly. Follow these steps to test the pull cord:

Check for Smooth Movement:
Gently pull on the cord to ensure it moves smoothly without any resistance or snagging.
Pull Cord Slowly:
Slowly pull the cord to engage the recoil spring. Listen for a clicking sound as the starter motor engages.
Pull Cord Swiftly:
Once the starter motor engages, pull the cord swiftly with a firm, even motion. This will activate the engine’s combustion process and start the lawn mower.
Observe the Rope’s Retraction:
After starting the engine, observe the rope’s retraction. It should return to its original position promptly and without hesitation.
Test Multiple Times:
Repeat steps 2-4 several times to ensure consistent starting and retraction of the pull cord.
Check for Fraying or Snapping:
Inspect the new pull cord for any signs of fraying or snapping. If any damage is detected, replace the cord immediately.
Adjust Windings (Optional):
If the pull cord retracts too quickly or too slowly, adjust the tension by slightly adjusting the windings on the recoil assembly.
Lubricate Pull Cord (Recommended):
Apply a small amount of lubrication to the pull cord to extend its lifespan and prevent future sticking.
Keep Pull Cord Clean:
Regularly clean the pull cord with a damp cloth to remove dirt and debris that can accumulate over time. This will help prevent jamming or breakage.