How To Put The String On A Weed Eater

Replacing the string on a weed eater, also known as a string trimmer, is a routine maintenance task essential for maintaining its cutting performance. This article provides a step-by-step guide on how to properly restring a weed eater, ensuring safe and efficient operation.
Understanding Your Weed Eater Head
Before commencing the restringing process, familiarize yourself with the type of trimmer head your weed eater utilizes. Common types include:
- Automatic Feed: This type automatically advances the line as it wears down during operation.
- Bump Feed: The operator bumps the trimmer head on the ground to advance the line.
- Manual Feed: The operator manually pulls the line to advance it.
- Fixed-Line Head: These heads use pre-cut lengths of line that are inserted into the head.
Consult your weed eater's user manual to identify your specific trimmer head type and any specific instructions related to it. The manual will provide valuable information unique to your model.
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Safety Precautions
Prior to any maintenance, including restringing, take the following safety precautions:
- Turn off the engine: Ensure the weed eater is completely turned off and the engine has cooled down.
- Disconnect the spark plug: For gasoline-powered models, disconnect the spark plug wire to prevent accidental starting.
- Wear safety glasses: Protect your eyes from debris that may be dislodged during the process.
- Wear gloves: Protect your hands from cuts and abrasions.
Restringing a Spool-Type Weed Eater Head
This section details the process for restringing a spool-type head, which is common in automatic, bump, and manual feed models.

Tools and Materials
- New trimmer line (diameter and type specified in your user manual)
- Wire cutters or scissors
- Work gloves
- Safety glasses
Step-by-Step Instructions
- Remove the Spool: Locate the release mechanism on the trimmer head. This may involve pressing tabs, twisting a knob, or unscrewing a retaining nut. Once released, carefully remove the spool from the trimmer head.
- Clean the Spool Housing: Inspect the spool housing for debris, such as grass clippings and dirt. Clean the housing thoroughly with a brush or compressed air. This will ensure smooth operation and prevent line breakage.
- Prepare the New Trimmer Line: Consult your user manual for the recommended length of trimmer line. Cut two equal lengths of line based on these recommendations. Using the correct diameter and length of line is critical for the tool's performance and safety.
- Locate the Spool Attachment Points: Examine the spool for small holes or slots where the trimmer line is to be inserted. Some spools have separate compartments for each line, while others use a single compartment with a divider.
- Insert the Line into the Spool: Insert one end of the trimmer line into the designated hole or slot on the spool. Follow the directional arrows embossed on the spool, if present. Wind the line tightly and evenly around the spool in the direction indicated by the arrows. Ensure that the line is wound neatly and without overlapping, as this can cause the line to jam during operation.
Note: Some spools require you to thread the line through a small eyelet or guide before winding. Refer to your user manual for specific instructions.
- Repeat for the Second Line: If your trimmer head uses two lines, repeat the process with the second length of trimmer line, winding it in the opposite direction from the first line. Maintain consistent tension while winding to ensure even distribution.
- Secure the Line Ends: Once the lines are fully wound, secure the ends in the retaining slots or clips on the spool. This prevents the lines from unwinding prematurely.
- Reinstall the Spool: Carefully reinsert the spool into the trimmer head, aligning the line ends with the exit holes in the head. Ensure that the spool clicks securely into place.
- Test the Line Advance: Manually pull on the trimmer lines to ensure they advance smoothly and evenly from the trimmer head. If the lines do not advance properly, remove the spool and check for tangles or incorrect winding.
Restringing a Fixed-Line Weed Eater Head
Fixed-line heads utilize pre-cut lengths of line that are inserted directly into the trimmer head. Restringing these heads is typically simpler than spool-type heads.
Tools and Materials
- Pre-cut trimmer line (length and type specified in your user manual)
- Wire cutters or scissors (if trimming line is necessary)
- Work gloves
- Safety glasses
Step-by-Step Instructions
- Remove the Old Line: Grasp the end of the worn or broken trimmer line and pull it straight out of the trimmer head. You may need to use pliers if the line is tightly wedged.
- Inspect the Line Insertion Points: Examine the holes or slots where the trimmer line is inserted. Clean out any debris or obstructions.
- Insert the New Line: Insert one end of the pre-cut trimmer line into the designated hole or slot. Push the line in firmly until it is securely seated. Some heads may have a locking mechanism that needs to be engaged.
- Repeat for All Lines: Repeat the process for each line that needs to be replaced. Ensure that all lines are of equal length and are securely inserted into the trimmer head.
- Test the Line Security: Gently tug on each line to ensure it is securely held in place. If a line pulls out easily, reinsert it and ensure that the locking mechanism (if applicable) is properly engaged.
Troubleshooting Common Problems
Line Breaks Frequently:

- Ensure you are using the correct diameter and type of line for your weed eater.
- Avoid trimming against hard surfaces such as concrete or brick.
- Check the trimmer head for rough edges or burrs that may be damaging the line.
- The line may be old and brittle. Replace with fresh line.
Line Won't Advance:
- Ensure the spool is wound correctly and the line is not tangled.
- Check the spool housing for debris that may be obstructing the line advance mechanism.
- The bump feed mechanism may be worn or damaged. Consider replacing the trimmer head.
Line Keeps Falling Out:

- Ensure the line is securely inserted into the trimmer head.
- Check the retaining clips or locking mechanism for damage or wear.
- You may be using line that is too thin for the trimmer head.
Maintaining Your Weed Eater Line
Proper storage of your trimmer line can extend its lifespan. Store trimmer line in a cool, dry place away from direct sunlight. Avoid storing line in damp or humid environments, as this can cause it to become brittle. Consider storing the line in a sealed container to prevent it from drying out.
Why Restringing Matters
Restringing your weed eater properly is not just about maintaining its cutting performance. It's also about safety and extending the life of your tool. A properly strung weed eater will operate more efficiently, reducing strain on the motor and preventing damage to the cutting head. Neglecting this essential maintenance task can lead to decreased performance, increased wear and tear, and potentially dangerous operating conditions. A sharp, properly installed line ensures a clean cut and reduces the risk of kickback or other accidents. By following the steps outlined in this article, you can ensure that your weed eater is always ready to tackle your lawn care needs effectively and safely.
