Winding strimmer line correctly is essential for smooth feeding and reliable cutting performance. If the line is wound incorrectly, it can become tangled, jam inside the spool, fail to feed, or break more frequently during use.

Fortunately, winding a strimmer spool is usually straightforward once you understand the correct technique.

In this guide we'll explain how to wind strimmer line correctly and avoid the most common mistakes.

Why Proper Winding Matters

The spool is designed to release line smoothly as it wears during use.

If the line is installed incorrectly, problems can occur such as:

• Line not feeding

• Line becoming tangled

• Frequent line breakage

• Poor cutting performance

• Excessive vibration

Correct winding helps ensure the strimmer operates efficiently and reduces unnecessary wear on the spool and feed mechanism.

Before You Start

You'll Need

• Replacement strimmer line

• The original spool

• Scissors or cutters

Safety First

For electric models:

• Disconnect from the mains supply

For cordless models:

• Remove the battery

For petrol models:

• Switch off the engine completely

Step 1 – Remove the Spool

Remove the spool from the strimmer head.

Most domestic strimmers use a simple clip-on cover.

Typical process

• Press the release tabs

• Remove the cover

• Lift out the spool

Take note of how the original line is installed before removing it.

Step 2 – Remove Old Line

Remove any remaining line from the spool.

Check the spool for:

• Cracks

• Excessive wear

• Damaged retaining slots

If the spool is damaged, replacing it may be a better option than rewinding it.

Step 3 – Select the Correct Line Diameter

Using the correct line size is important.

Line that is too thick may jam.

Line that is too thin may break easily.

Always check

• Manufacturer recommendations

• Original line specifications

• Spool markings

Using the correct diameter helps ensure reliable feeding.

Step 4 – Locate the Anchor Hole

Most spools have a small hole or slot designed to secure the beginning of the line.

Insert approximately 10-15cm of line into the anchor point.

This prevents the line from slipping during winding.

Step 5 – Wind in the Correct Direction

Most spools include arrows showing the correct winding direction.

Important

Always follow the direction indicated on the spool.

Winding the line backwards is one of the most common causes of feeding problems.

While winding

• Keep the line under light tension

• Lay coils neatly side-by-side

• Avoid crossing or overlapping loops

Neat winding is critical for smooth operation.

Step 6 – Leave Enough Free Line

When the spool is nearly full:

• Stop winding

• Leave approximately 10-15cm of free line

Most spools include retaining slots that hold the loose ends in place during installation.

Step 7 – Refit the Spool

Feed the loose ends through the eyelets in the strimmer head.

Carefully position the spool back into the housing.

Check that

• The spool sits correctly

• The line exits freely

• Nothing is trapped underneath

Step 8 – Refit the Cover

Replace the spool cover and ensure it clips securely into place.

Pull the line gently to release it from any retaining slots.

The line should move freely without resistance.

Common Winding Mistakes

Many feeding issues can be traced back to incorrect winding.

Avoid these mistakes

Winding in the Wrong Direction

This can prevent the bump-feed system from working correctly.

Overfilling the Spool

Too much line can cause tangles and jams.

Crossing the Line

Overlapping coils often lock together during use.

Using the Wrong Line Size

Incorrect diameter can affect both feeding and cutting performance.

Single-Line vs Dual-Line Spools

Different strimmers use different spool designs.

Single-Line Spools

Use one continuous length of line.

Dual-Line Spools

Use two separate lengths or a folded length of line.

Always follow the design of your original spool.

When to Replace Instead of Rewind

In some situations, fitting a new spool may be easier.

Consider replacing the spool if:

• The spool is cracked

• The retaining tabs are broken

• The feed mechanism is worn

• The spool no longer rotates smoothly

Pre-wound replacement spools can save time and ensure reliable operation.

How This Relates to Other Strimmer Problems

Incorrect winding is often responsible for other common faults.

For example:

• If the line will not advance, see Why Is My Strimmer Line Not Feeding? Causes and Fixes

• If the line breaks repeatedly, read Strimmer Line Keeps Breaking – Causes and Fixes

• If the machine vibrates excessively, see Strimmer Vibrating Excessively – Causes and Fixes

Choosing the Right Replacement Line

When purchasing replacement line, check:

• Brand compatibility

• Recommended diameter

• Line profile

• Maximum spool capacity

Using the correct line helps improve feeding performance and cutting efficiency.

You can find replacement strimmer line, pre-wound spools, spool covers, and complete strimmer heads for many popular brands from Yourspares.

Final Thoughts

Learning how to wind strimmer line correctly can save time, reduce frustration, and improve the performance of your garden equipment.

By winding the line neatly, using the correct diameter, and following the spool's winding direction, you can help ensure smooth feeding and efficient trimming every time.

Related Garden Equipment Advice

• Why Is My Strimmer Line Not Feeding? Causes and Fixes

• Strimmer Line Keeps Breaking – Causes and Fixes

• Strimmer Head Not Spinning – Causes and Fixes

• Electric Strimmer Won't Start – Causes and Fixes

• Petrol Strimmer Won't Start – Causes and Fixes

• Strimmer Vibrating Excessively – Causes and Fixes

• How to Replace a Strimmer Spool