The first warm rays of spring have arrived, and the birds are singing their sweet morning songs. The air is filled with the promise of new beginnings, and you can already picture yourself enjoying your perfectly manicured lawn. But, wait! Your lawnmower won’t start. The pull cord is frayed, limp, and seemingly useless. Don’t despair! A broken pull cord doesn’t have to mean the end of your lawn mowing dreams. This comprehensive guide will walk you through the process of replacing a broken pull cord and getting your mower back in action.
Understanding the Pull Cord System
The pull cord is an essential part of your lawnmower’s engine starting system. When you pull the cord, it engages a spring-loaded mechanism that spins the engine’s crankshaft, creating the necessary force to start the engine. This process involves a series of interconnected parts:
- Pull Cord Handle: This is the part you physically pull.
- Pull Cord: A nylon cord that runs through a series of pulleys and guides, connecting the handle to the engine.
- Recoil Spring: A powerful spring that stores energy from the pull and then releases it to spin the engine.
- Recoil Starter Housing: This houses the recoil spring, pulleys, and other moving parts.
- Engine Crankshaft: The heart of the engine, which is spun by the recoil starter.
A broken pull cord can be frustrating, but it’s a relatively easy fix that can be done with some basic tools and a little patience.
How to Replace a Lawn Mower Pull Cord
Before you begin, gather the following tools and materials:
- New pull cord (make sure it’s the correct length and type for your mower)
- Screwdriver (Phillips head)
- Pliers
- Safety glasses
Steps to replace the pull cord:
- Disconnect the Spark Plug: This is a crucial safety step to prevent the engine from accidentally starting while you’re working on the recoil system. Locate the spark plug on the engine, and use a wrench to loosen and remove it.
- Remove the Recoil Starter Housing: The location of the housing can vary depending on the mower model, but it is typically found on the top of the engine. Use a screwdriver to remove the screws holding the housing in place.
- Remove the Old Pull Cord: The old cord might be frayed, broken, or tangled. Use pliers to carefully remove the old cord from the recoil housing.
- Install the New Pull Cord: Starting at the handle end, thread the new cord through the various pulleys and guides within the housing.
- Re-attach the Handle: Once the cord is threaded through, attach the new pull cord handle to the housing. Make sure it’s securely attached.
- Test the New Pull Cord: Before reassembling the housing, pull the cord a few times to ensure it’s properly installed and working smoothly.
- Reinstall the Recoil Starter Housing: Once the new cord is installed and tested, reassemble the recoil starter housing by securing the screws.
- Reconnect the Spark Plug: Reinstall the spark plug and tighten it securely.
Troubleshooting Common Pull Cord Issues
While replacing a broken pull cord is often a straightforward process, you might encounter some common issues. Here’s how to tackle them:
1. The Pull Cord is Too Short or Too Long
- Problem: If the pull cord is too short, it may not reach the engine enough to engage the recoil system. Conversely, a cord that’s too long can become tangled or frayed.
- Solution: Choose a pull cord that is specifically designed for your lawnmower model. You can often find replacement cords at local hardware stores or online retailers. Measure the old cord to determine the correct length for your replacement cord.
2. The Pull Cord is Tangled or Frayed
- Problem: A tangled pull cord can interfere with the recoil mechanism. Frayed cord can be a sign of wear and tear or improper installation.
- Solution: For a tangled cord, carefully untangle it by hand. If the cord is frayed, it’s best to replace it with a new one.
3. The Recoil Spring is Weak
- Problem: A weak recoil spring will not have enough force to spin the engine. You might notice that the engine doesn’t turn over easily when you pull the cord.
- Solution: If you suspect a weak recoil spring, it’s best to replace it. Replacing a recoil spring involves disassembling the entire recoil mechanism, so it’s a more complex repair that may require assistance from a qualified mechanic.
Tips for Maintaining Your Pull Cord
- Regular Inspection: Inspect your pull cord regularly for signs of wear and tear, like fraying or tangles.
- Keep it Clean: A clean pull cord is less likely to get tangled. Use a cloth to wipe away any dirt or debris that might accumulate around the housing.
- Avoid Overstretching: Don’t pull the cord too forcefully, as it can lead to premature wear and tear.
Conclusion: A Spring-Loaded Success
Replacing a broken pull cord is a simple repair that can save you time and money. By following the steps outlined in this guide, you can confidently fix your lawnmower and get back to enjoying a beautifully manicured lawn. Remember, always prioritize safety by disconnecting the spark plug before working on any part of the engine. With a little effort and the right tools, you can get your lawnmower back in action and ready to tackle any grass-cutting challenge.
Frequently Asked Questions
How do I know if my lawnmower’s pull string is broken?
You’ll know your pull string is broken if it’s frayed, stretched, or completely detached. It might also be difficult to pull the string to start the mower. If you can’t feel the string moving when you pull, it’s likely broken.
How do I remove the old pull string?
First, you’ll need to disconnect the spark plug wire to prevent accidental starting. Next, locate the pull-start housing, which is usually found on the top of the mower engine. There will be a small cover or a series of screws holding the housing together. Remove these to access the string and remove it.
What type of pull string should I use?
You’ll need a replacement string that’s specifically designed for your lawnmower model. Check your owner’s manual or contact the manufacturer for the correct string type. It’s important to use a string that’s the right thickness and length for your engine.
How do I attach the new pull string?
First, thread the new string through the small hole in the recoil assembly. The string will need to wrap around the spindle in the recoil assembly several times. You may need to use a tool to help wind the string, and it’s important to make sure the string is wound tightly.
What happens if I don’t replace the pull string?
If you don’t replace the pull string, you won’t be able to start your lawnmower. This could make it very difficult or impossible to maintain your lawn, and you might need to hire someone to do it for you.
Can I replace the pull string myself?
Yes, you can replace the pull string yourself. It’s a fairly straightforward repair that can be done with basic tools. However, if you’re not comfortable working with small engine parts, it’s best to take your mower to a qualified technician.
What other parts of my lawnmower might need to be replaced?
While replacing the pull string is a common repair, it’s also a good opportunity to check other components of your lawnmower’s starting system. Inspect the recoil spring, the starter rope, and the recoil assembly itself. Any of these parts could be worn or damaged, and might need to be replaced.