Tired of yanking and tugging at your lawn mower’s pull cord, only to be met with frustrating resistance? A broken or frayed pull cord can turn your mowing routine into a battle of wills. Don’t despair! Replacing a lawn mower pull cord is a surprisingly simple DIY task that can save you time, money, and a lot of frustration. This comprehensive guide will walk you through the entire process, from understanding the different types of cords to actually replacing them.
In a nutshell, replacing a lawn mower pull cord involves removing the old cord, installing a new one, and reassembling the starter assembly. But before you get started, you’ll need to determine the type of cord your mower uses and gather the right tools.
Understanding Your Lawn Mower Pull Cord
Before jumping into the replacement process, it’s important to understand the different types of pull cords available and how they function:
Rope and Spring System
This is the most common type of pull cord system found in most lawn mowers. It involves a rope that winds around a spring, providing the necessary tension to start the engine. When you pull the rope, the spring unwinds, spinning the engine’s crankshaft and eventually igniting the spark plug.
Recoil Starter System
A recoil starter system is more advanced and uses a spring-loaded mechanism to provide the power for the initial engine crank. The pull cord is connected to a gear that engages with the crankshaft, allowing for a faster and more consistent start.
Determining the Correct Cord for Your Mower
To ensure you get the right replacement cord, check the manual for your specific lawn mower model. If you don’t have the manual, you can often find it online. The manual will specify the type of pull cord required and might even provide a part number. If you can’t find the information, you can take the old pull cord to your local hardware store or lawn mower repair shop for assistance.
Gathering the Necessary Tools
Before you get started, make sure you have all the tools you’ll need for the replacement process:
- Phillips head screwdriver: This is essential for removing the starter housing screws.
- Flathead screwdriver: You might need this if your lawn mower has a stubborn starter housing or if you need to pry open any clips.
- Wire cutters: Used to cut the old pull cord.
- Needle-nose pliers: These can be helpful for grabbing and manipulating small parts.
- New pull cord: The most important tool! Make sure you get the correct length and type for your mower.
The Step-by-Step Replacement Process
Now that you have all the necessary tools and understand the basics, it’s time to get down to business. Here’s a comprehensive step-by-step guide on how to replace the pull cord on your lawn mower:
1. Disengage the Blade
- Safety First: This is a crucial step. Before you even think about touching the starter assembly, make absolutely sure the blade is disengaged. You can do this by turning off the mower, removing the spark plug wire, and engaging the blade brake if your mower has one.
- Additional Safety Measures: If you’re not comfortable working with the blade, it’s always best to disconnect the spark plug wire completely, or even better, remove the spark plug from the cylinder head. This eliminates any chance of accidental engine starting.
2. Access the Starter Housing
- Locate the Starter Housing: The starter housing is typically located on the side of the engine, near the flywheel or crankshaft.
- Remove Housing Screws: Use a Phillips screwdriver to remove the screws that hold the starter housing in place. Be careful not to strip the screws, as this can make them difficult to remove in the future.
- Remove the Housing: Once the screws are removed, you should be able to easily detach the starter housing.
3. Disconnect the Old Pull Cord
- Remove the Old Cord: The old pull cord is typically attached to the starter housing with a spring-loaded clip or a simple knot.
- Release the Clip or Knot: Use a flathead screwdriver or needle-nose pliers to carefully pry open the clip or untie the knot.
- Remove the Old Rope: Once the clip is removed, the old pull cord will be free to remove.
4. Install the New Pull Cord
- Thread the New Cord: The new pull cord should come with a pre-attached spring or a separate spring that you’ll need to attach. Thread the cord through the starter housing, ensuring it runs smoothly around the flywheel or crankshaft.
- Secure the Cord: Once the cord is threaded, secure it using the same clip or knot as the old cord. Make sure it is securely fastened, as you don’t want it to come undone while you’re using the mower.
- Test the Cord: Before you reassemble the starter housing, pull the new cord a few times to make sure it’s working properly and that the spring is engaging correctly.
5. Reassemble the Starter Housing
- Replace the Housing: Place the starter housing back onto the engine and align the screw holes.
- Secure the Housing: Use the Phillips head screwdriver to reattach the screws you removed earlier. Make sure the screws are secure but don’t overtighten them, as this can damage the starter housing.
6. Reconnect the Spark Plug Wire
- Reconnecting the Wire: Carefully reconnect the spark plug wire to the spark plug.
- Double-Check: Ensure the wire is securely attached and that there are no loose connections.
7. Start the Mower
- Final Test: Now, start the mower to make sure everything is working properly.
- Confirm Function: The new pull cord should operate smoothly, providing a quick and consistent start.
Troubleshooting Common Issues
Even with the most straightforward replacement process, you might encounter some issues. Here’s a look at some common problems and their solutions:
1. The Cord is Too Tight:
If the cord is too tight, it can make starting the mower difficult or even impossible.
- Solution: Adjust the tension on the spring by loosening the nut or bolt that holds it in place.
2. The Cord is Too Loose:
A loose cord won’t provide enough tension to start the mower.
- Solution: Tighten the nut or bolt that holds the spring in place, increasing the tension on the cord.
3. The Cord Snaps:
- Solution: If the cord breaks during the process, you will need to repeat the entire replacement process with a new cord.
4. The Mower Won’t Start:
- Solution: Double-check that the spark plug wire is securely connected and that the blade is disengaged. If the mower still won’t start, you may have other engine issues that require further troubleshooting.
Additional Tips and Safety Considerations
- Always disconnect the spark plug wire before working on the starter assembly. This is the most important safety precaution you can take.
- Wear safety glasses and gloves when working with tools and the pull cord.
- If you’re not comfortable working with tools or are unsure about any step in the process, it’s best to take your lawn mower to a qualified technician for repair.
- Maintain the pull cord by regularly checking for wear and tear. This will help prevent unexpected breakage and make your lawn mowing experience more enjoyable.
With a little patience and the right tools, you can easily replace your lawn mower’s pull cord and get back to enjoying a perfectly manicured lawn.
FAQs
1. Why is my pull cord so hard to pull?
There are several reasons why your pull cord might feel stiff. First, check if the engine oil level is low. Low oil can lead to friction and make pulling difficult. Second, inspect the recoil spring for wear and tear. A weakened spring won’t provide enough power to start the engine easily. Lastly, examine the pull cord itself for any fraying or tangles. A damaged cord can add resistance and make pulling harder.
2. How do I fix a broken pull cord?
Repairing a broken pull cord is a relatively simple process. Begin by disconnecting the spark plug to prevent accidental starting. Then, remove the old cord and replace it with a new one. Make sure to thread the new cord through the recoil housing correctly, following the manufacturer’s instructions. Finally, reconnect the spark plug and give the new cord a test pull.
3. What if my recoil spring is broken?
A broken recoil spring is a more serious problem and requires replacing the entire recoil assembly. This process can vary depending on the mower model, but generally involves removing the recoil housing and installing the new assembly. It’s important to use a replacement part that’s compatible with your mower. If you’re uncomfortable with the repair, it’s best to consult a professional mechanic.
4. My pull cord won’t retract. What’s going on?
A non-retracting pull cord often indicates a problem with the recoil assembly itself. The spring might be malfunctioning, the pawl could be worn, or there might be debris obstructing the mechanism. This issue requires dismantling the recoil housing and inspecting the components. If you find any damage, it’s necessary to replace the affected part or the entire assembly.
5. What are some tips for preventing future issues with the pull cord?
To prevent future problems, ensure proper maintenance of your lawn mower. Regularly check the oil level and change it according to the manufacturer’s recommendations. Also, inspect the pull cord and recoil spring for wear and tear, and replace them when necessary. Avoid pulling the cord with excessive force, as this can damage the components.
6. Can I use a different type of pull cord?
It’s generally not recommended to use a different type of pull cord. The cord is designed to work specifically with the recoil assembly in your mower. Using an incompatible cord can cause issues with retraction, performance, and safety. Always refer to the manufacturer’s instructions for replacement part recommendations.
7. When should I consider professional help?
If you’re uncomfortable with the repair process or if the issue persists despite your attempts, it’s best to seek professional help. A qualified mechanic can diagnose the problem accurately and perform the necessary repairs. This will ensure that your lawn mower is functioning correctly and safely.