Have you ever found yourself struggling to start your Murray lawn mower, the pull cord feeling limp and unresponsive? The frustration of a broken pull cord can quickly turn a simple mowing chore into a major annoyance. But fear not, replacing a pull cord is a relatively simple DIY task that can save you money and time. This comprehensive guide will walk you through the entire process, from identifying the problem to installing a new pull cord, making your Murray lawn mower roar back to life.
Replacing a Broken Pull Cord: A Quick Overview
The pull cord system on a lawn mower connects the handle to the engine via a series of components, including the recoil spring, a rope, and a pulley system. When the cord is pulled, it rotates the engine crankshaft, initiating the combustion process and starting the mower. A broken pull cord can be caused by wear and tear, improper use, or even a faulty recoil spring. To replace the pull cord, you’ll need to remove the old one, install a new one, and then reassemble the pull start mechanism.
1. Gather Your Tools and Supplies
Before you begin, gather the necessary tools and supplies. This will help you avoid unnecessary delays and frustration.
1.1 Required Tools
- Phillips screwdriver: You’ll need a screwdriver to remove screws holding the pull start assembly.
- Flathead screwdriver: You might need a flathead screwdriver to pry off the pull start cover if it’s stuck.
- Adjustable wrench: To loosen or tighten the nut holding the pulley in place.
- Wire cutters: For trimming the new pull cord to the correct length.
- Safety Glasses: Protect your eyes from flying debris.
- Gloves: For a better grip and to protect your hands.
1.2 Required Supplies
- New pull cord: Ensure you buy a pull cord that’s specifically designed for your Murray lawn mower model.
- Spray lubricant: To lubricate the recoil spring and other moving parts.
2. Disassemble the Pull Start Assembly
Now that you have everything ready, you can start disassembling the pull start assembly.
2.1 Remove the Pull Start Cover
- Locate the pull start assembly: It’s usually located on the side of the engine, near the handle.
- Remove the screws: Carefully remove the screws holding the pull start cover in place. There may be two or more screws.
- Remove the cover: Gently lift off the pull start cover. Be careful not to damage the underlying components.
2.2 Remove the Old Pull Cord
- Locate the cord’s connection point: Find where the old pull cord is attached to the pulley. It’s usually secured with a knot or a clip.
- Remove the old cord: Carefully cut or untie the old pull cord from the pulley. It’s important to note that some pull cords might be attached to the recoil spring. If that’s the case, you’ll need to detach the old cord from the spring as well.
3. Install the New Pull Cord
Once the old pull cord is removed, you can start installing the new one.
3.1 Attach the New Pull Cord to the Pulley
- Thread the new cord: Pass the new pull cord through the pulley. Make sure the cord is properly positioned and not twisted.
- Secure the cord: Tie a secure knot or use a clip to secure the new pull cord to the pulley.
- Attach the cord to the recoil spring: If the pull cord is connected to the recoil spring, attach the new cord to the spring, ensuring it’s properly seated.
3.2 Test the Pull Cord
- Pull the new cord: Gently pull the new pull cord a few times to make sure it’s securely attached and operating smoothly.
- Check for any resistance: If you encounter any resistance or if the cord feels loose, re-check your connections.
4. Reassemble the Pull Start Assembly
Now that the new pull cord is installed, you can reassemble the pull start assembly.
4.1 Reattach the Pull Start Cover
- Position the cover: Carefully place the pull start cover back onto the assembly. Make sure it’s aligned properly.
- Secure the screws: Tighten the screws holding the cover in place, but don’t overtighten them.
4.2 Lubricate the Recoil Spring
- Apply lubricant: Apply a small amount of spray lubricant to the recoil spring and other moving parts of the pull start assembly. This helps to reduce friction and improve the overall performance of the pull start mechanism.
5. Start Your Murray Lawn Mower
With the pull start assembly reassembled, you can now start your Murray lawn mower.
5.1 Test the New Pull Cord
- Pull the cord: Carefully pull the new cord to start the lawn mower engine. Make sure the new pull cord operates smoothly and starts the engine without any problems.
5.2 Enjoy Your Mowing Experience
Congratulations! You’ve successfully replaced the pull cord on your Murray lawn mower. Now you can enjoy a smooth and efficient mowing experience without any frustrating pull cord issues.
Troubleshooting Common Issues
While replacing a pull cord is a relatively simple task, you might encounter a few issues along the way. Here’s what to do if you run into any problems:
5.1 The New Pull Cord Doesn’t Start the Engine
- Check the connection: Make sure the new pull cord is securely attached to the pulley and recoil spring.
- Ensure proper tension: If the cord feels too loose, tighten the knot or clip. If it feels too tight, loosen it slightly.
- Inspect the recoil spring: Make sure the recoil spring is not broken or damaged. If it’s faulty, you’ll need to replace it.
5.2 The Pull Cord Feels Stiff or Difficult to Pull
- Lubricate the recoil spring: Apply lubricant to the recoil spring and other moving parts to reduce friction.
- Check for obstructions: Make sure there are no obstructions in the pull start assembly that are interfering with the cord’s movement.
- Ensure the pulley is free-spinning: The pulley should spin freely. If it’s stuck, you might need to clean or lubricate it.
Preventive Maintenance Tips
Replacing the pull cord is one way to ensure your Murray lawn mower is running smoothly. Here are a few more preventive maintenance tips to keep your mower in top shape:
- Regularly check the pull cord: Inspect the pull cord for any signs of wear and tear, such as fraying or loose knots. Replace the cord if necessary.
- Lubricate the recoil spring: Apply lubricant to the recoil spring every few months to reduce friction and wear.
- Clean the pull start assembly: Dust and debris can accumulate in the pull start assembly, interfering with its function. Clean the assembly regularly.
Conclusion: A Simple Fix for a Common Problem
Replacing a broken pull cord on your Murray lawn mower is a relatively straightforward task that can be easily accomplished with a few simple tools and supplies. Following these steps, you can effectively repair your mower, avoid costly service calls, and get back to enjoying your well-manicured lawn in no time. Remember to always prioritize safety and to use the right tools and parts for the job. With a little effort, you can keep your Murray lawn mower running smoothly and efficiently for years to come.
FAQs
What tools do I need to replace the pull cord on a Murray lawn mower?
You will need a few basic tools to replace the pull cord on your Murray lawn mower. These include a Phillips screwdriver, a wrench (usually a 1/2-inch or 9/16-inch), and a pair of pliers. You may also need a small hammer and a punch if you need to remove any stubborn parts. Make sure you have the new pull cord on hand as well, which you can often find at your local hardware store or online.
It is also essential to have a safe work space with adequate lighting. Disconnecting the spark plug is always a good safety measure before working on any engine components. This will prevent accidental starting while you are working on the pull cord mechanism. Having these tools and taking these precautions will ensure a smooth and safe replacement process.
How do I know if the pull cord is the problem?
Several signs may indicate a problem with your pull cord. If the cord feels loose, frayed, or broken, it is likely the issue. Another tell-tale sign is a lack of resistance when pulling the cord, which could mean the cord has slipped off the pulley or that the recoil spring is broken.
If you hear a strange noise when pulling the cord, this also suggests a problem. This noise could be a snapping sound, a grinding noise, or a continuous whirring. Finally, if the engine doesn’t start after multiple pulls, the pull cord may be the culprit. If you notice any of these signs, it’s time to inspect and possibly replace your pull cord.
How do I remove the old pull cord?
First, disconnect the spark plug to prevent accidental starting. Then, locate the pull cord housing on your lawn mower’s engine. The housing usually has a small cover that can be removed with a Phillips screwdriver. Next, use pliers to carefully detach the pull cord from the recoil starter mechanism.
Once the cord is detached, you can remove the old cord by threading it out of the housing and detaching it from the handle. You may need to use a small punch and hammer to tap out any stubborn parts. Be sure to keep track of the parts and their order of removal for easier reassembly.
How do I install the new pull cord?
Installing a new pull cord is essentially the reverse of removing the old one. First, thread the new pull cord through the housing. Ensure you align the cord properly with the pulley on the recoil starter mechanism and attach it to the recoil starter.
You can then attach the new cord to the handle. Replace the housing cover and secure it with the Phillips screwdriver. Finally, reconnect the spark plug, test the new pull cord, and enjoy a smooth-starting lawn mower.
What if the pull cord is not the problem?
While a faulty pull cord is a common cause of starting issues, other problems can lead to a lawn mower refusing to start. These include a clogged air filter, a faulty spark plug, a lack of fuel, or a dead battery.
If you have already replaced the pull cord and your lawn mower still won’t start, you will need to diagnose and address these other potential issues. Checking these components will help you determine the true source of the starting problem and get your mower running smoothly again.
How often should I replace the pull cord?
While there’s no strict schedule for replacing pull cords, it’s best to inspect them regularly for signs of wear and tear. Pull cords are usually made of durable materials, but they can still deteriorate over time due to exposure to the elements, frequent use, and general wear and tear.
If you notice any fraying, cracking, or stretching in the cord, it’s time to replace it. A worn-out cord can be a safety hazard, and replacing it before it breaks can prevent future problems.
What safety precautions should I take when replacing the pull cord?
Safety is always paramount when working on any mechanical device, and replacing a lawn mower’s pull cord is no exception. Always wear safety glasses and gloves to protect your eyes and hands. Always disconnect the spark plug to prevent accidental starting.
Avoid using sharp tools near the engine, and handle the new pull cord carefully to avoid damage. If you are unsure of any steps, it is always best to consult the manufacturer’s instructions or seek help from a qualified mechanic. Taking these precautions will ensure a safe and successful pull cord replacement.