Quick Answer
If your cordless grass trimmer line keeps breaking, the most common causes are an incorrectly wound spool, using the wrong line diameter, or cutting material that is too thick for a grass trimmer.
Checking the spool installation and using the correct line for your model will usually resolve the issue.
Before You Start
Before inspecting the spool, make sure:
- The trimmer is switched off
- The battery has been removed
- The cutting head has come to a complete stop
Always:
- Wear protective gloves when handling the cutting head
- Work on a clean, stable surface
- Refer to your user manual for the correct line specification
Important: Never carry out maintenance while the battery is installed.
Why the Trimmer Line Keeps Breaking
Common causes include:
- The line is incorrectly wound onto the spool
- The wrong line diameter has been fitted
- The spool is worn or damaged
- The trimmer is being used on thick or woody vegetation
- The line is old, brittle, or damaged
How to Fix Frequent Line Breakage
Follow these steps to identify the cause.
1. Check the spool
Remove the spool and ensure:
- The line is wound neatly in the correct direction
- The line is not crossed or tangled
- The spool is correctly fitted
An incorrectly wound spool can cause the line to snag and break
2. Try the spare spool
If your trimmer was supplied with an additional spool and line:
- Install the spare spool
- Test the trimmer again
If the replacement works correctly, the original spool may be faulty or incorrectly wound.
3. Check the line diameter
Ensure you are using the correct trimmer line for your model.
Most cordless grass trimmers use a 1.2 mm line, but always refer to your user manual for the correct specification.
Using a thicker or thinner line than recommended can affect performance and increase breakage.
4. Use the trimmer on suitable vegetation
Grass trimmers are designed for:
- Grass
- Light weeds
- Soft plant growth
Avoid using the trimmer on:
- Thick weeds
- Woody stems
- Shrubs
- Small branches
Attempting to cut heavy vegetation can cause the line to snap repeatedly.
If the Problem Continues
If the line continues to break after completing these checks:
- Inspect the spool for wear or damage
- Replace the line with a new, genuine replacement if necessary
- Contact our customer service team via Live Chat or submit a support ticket for further assistance
Important Maintenance Tips
- Always use the recommended line diameter for your model
- Replace worn or brittle line before use
- Rewind the spool carefully to prevent tangles
- Avoid striking hard surfaces such as walls, kerbs, or fences
- Only use the trimmer on grass and light vegetation
Frequently Asked Questions
Why does my trimmer line keep snapping?
This is usually caused by using the wrong line, an incorrectly wound spool, or cutting vegetation that is too thick.
What size trimmer line should I use?
Most models use 1.2 mm line, but always check your user manual for the correct specification.
Can the spool cause the line to break?
Yes. A damaged or incorrectly wound spool can cause the line to snag and snap during use.
Can I use my grass trimmer on woody plants?
No. Grass trimmers are designed for grass and light weeds. Thick or woody plants can cause excessive line breakage.
What should I do if the line still keeps breaking?
If the issue persists after checking the spool and line, please contact our customer service team for further assistance.
