How To Put A Pull String On A Lawn Mower?
To put a pull string on a lawn mower, you generally thread the new rope through the recoil starter housing, tie a secure knot, and then properly wind it around the pulley system.
This process ensures your mower’s engine can be safely and effectively started again, restoring its essential function and getting you back to a tidy yard.
Just need the quick answers? Here’s the gist of how to replace your lawn mower’s pull cord:
- Always disconnect the spark plug wire first for safety.
- Remove the old, broken rope and the recoil starter assembly.
- Carefully thread the new starter rope through the housing.
- Securely tie a proper knot on both ends of the rope.
- Reassemble everything and perform a quick test to ensure smooth operation.
How To Put A Pull String On A Lawn Mower?
Replacing a lawn mower pull string involves removing the old starter, threading new rope through the recoil system, tying secure knots, and then carefully reassembling it.
It’s a straightforward task most homeowners can manage with basic tools and patience, saving you a trip to the repair shop.
Picture this: you’re ready to tackle the overgrown lawn, you give that pull string a tug, and… snap! Your mower goes silent. Sound familiar? Don’t worry, it happens.
A broken pull string, also called a starter rope, is a common problem. But guess what? It’s often simpler to fix than you might imagine. We’re here to guide you through putting a new pull string on your lawn mower, step-by-step.
Safety First: Your Most Important Step
Before you lay a finger on your lawn mower, safety is paramount. You are working with sharp blades and an engine that could potentially start.
Many experts say disconnecting the spark plug wire is your most important safety step (Outdoor Power Equipment Institute). This prevents the engine from accidentally starting while you’re working.
Just pull the rubber boot off the spark plug and tuck it away. This simple action keeps you safe.
Gather Your Tools: Be Prepared
You don’t need a massive workshop for this repair. Having everything ready saves time.
Here’s a quick list of what you’ll likely need for this project:
| Tool | Why You Need It |
|---|---|
| Socket Wrench Set | To remove bolts securing the starter housing. |
| Screwdriver (Phillips/Flathead) | For various screws on the housing or cover. |
| Needle-Nose Pliers | Helpful for gripping small parts or knotting. |
| Utility Knife or Scissors | To cut the new rope to the correct length. |
| Lighter or Matches | To slightly melt (fray-proof) the rope ends. |
| New Starter Rope | The star of the show! Make sure it’s the correct diameter. |
Removing the Old Starter Assembly
Tools ready, spark plug disconnected? Great! Next, access the starter mechanism. This is usually at the top or side of the engine, often under a housing.
You’ll typically see a few bolts or screws holding this housing. Carefully unscrew them and gently lift the entire recoil starter assembly off the engine. Keep track of all screws.
Taking Out the Old Rope
With the starter assembly in hand, locate the old pull string. If it’s still partially attached, cut it off. You need a clear path for the new rope.
Look for where the old rope connected to the recoil pulley inside the assembly. There’s usually a small knot or slot. Untie or remove any old rope pieces.
Preparing Your New Pull String
Now, cut the new rope to the right length. We found matching the old rope’s length is a good rule of thumb if you still have it.
If not, 6-8 feet is typical for most mowers (Small Engine Repair Manuals). Once cut, quickly melt both ends of the new rope with your lighter.
This prevents fraying, making threading easier and extending its life.
Threading the New Rope Through the Recoil Starter
This is often the trickiest part, but with a little patience, you’ve got this. The recoil starter has a spring-loaded pulley that rewinds the rope.
Push one rope end through the outer housing hole, where the handle sits. Guide it inside the assembly.
Winding the Recoil Spring Correctly
This is crucial! The recoil spring needs tension to retract the rope. If your old rope snapped, the spring might still be partially wound.
Gently turn the pulley counter-clockwise 3-4 turns until you feel resistance; don’t overwind. This creates tension. Many mechanics suggest holding the pulley to maintain tension.
Securing the Rope to the Pulley
With the spring wound and held, thread the rope through the hole in the pulley itself. This hole often has a small notch.
Pull 6-8 inches of rope through the pulley and tie a secure knot. An overhand or figure-eight knot works well. Ensure the knot is big enough not to pull through the hole.
Release the pulley slowly, letting the spring pull the rope in, but keep the outer end from disappearing.
Attaching the Starter Handle
With rope wound, thread its free end through the starter handle hole. Pull it taut, ensuring the rope is fully extended.
Tie another strong knot at this end, against the handle. Trim excess rope, leaving a small tail, and melt the end for durability.
Reassembling Your Lawn Mower
Almost done! Now reassemble everything. Carefully position the recoil starter assembly back onto the engine block, aligning it with the bolt holes.
Replace all screws or bolts. Tighten them securely but don’t overtighten. Ensure everything is snug and stable.
Final Checklist Before Mowing
Before you celebrate and attack your lawn, let’s do a quick final check:
- Is the spark plug wire reconnected securely?
- Does the pull string extend and retract smoothly?
- Does the handle feel firm and well-attached?
- Are all screws and bolts tightened on the starter housing?
- Is there any lingering debris from the repair?
Test Your Work: The Moment of Truth
Everything reassembled and checked, it’s time to test. Give the pull string a gentle tug. It should extend smoothly and then retract fully.
If not, recheck your recoil spring’s winding. Once satisfied, connect the spark plug wire, prime your mower, and give it a firm pull.
With any luck, your mower will roar to life, ready to tackle that grass!
Conclusion
Replacing a lawn mower pull string might seem daunting, but it’s a manageable repair. By following these steps—prioritizing safety, gathering tools, careful assembly, and correct reassembly—you can restore your mower’s starting power.
This DIY fix saves money and provides accomplishment. You’ve brought your trusty mower back to life, and now you’re fully equipped to keep your yard looking its best. Happy mowing!
Frequently Asked Questions About Pull Strings
What kind of rope should I use for a lawn mower pull string?
You should always use a specialized starter rope, usually made of braided nylon or polyester. These materials are chosen for strength, abrasion resistance, and flexibility, essential for enduring repeated pulling. Using ordinary rope can lead to quick wear and another broken string.
How do I know what diameter pull string I need?
The best way to determine the correct diameter is to measure your old rope if you still have a piece. If not, check your lawn mower’s owner’s manual or search online with your mower’s make and model number. Common diameters for walk-behind mowers often range from 5/32 to 3/16 of an inch.
Can I fix a pull string without taking the whole starter assembly off?
In some rare cases, if only the handle end of the rope broke off and the rope itself is still intact within the recoil, you might be able to re-tie it to the handle. However, if the rope snapped closer to the engine or inside the housing, you will almost certainly need to remove the entire starter assembly to properly thread and knot a new rope.
Why does my new pull string not retract properly?
If your new pull string isn’t retracting, the most common reason is insufficient tension in the recoil spring. You likely didn’t wind the pulley enough counter-clockwise before securing the rope. You might need to disassemble it again, rewind the pulley for an additional turn or two, and re-tie the rope to ensure proper spring tension.
How often should a lawn mower pull string be replaced?
A pull string doesn’t have a fixed replacement schedule; it should be replaced when it shows signs of wear, fraying, or breaks entirely. Its lifespan depends on usage frequency, how gently you pull it, and environmental factors. Regular inspection for wear is a good practice to prevent unexpected breakage.
