A well-maintained strimmer, also known as a string trimmer or weed eater, is an indispensable tool for keeping your lawn neat and tidy. One crucial aspect of strimmer maintenance is knowing how to replace the strimmer wire, as the line can wear down over time with regular use. In this step-by-step guide, we’ll walk you through the process of replacing strimmer wire, ensuring your tool is always ready to tackle overgrown grass and weeds effectively.

Replacing Garden Strimmer Wire

Step 1: Gather the Necessary Tools and Materials

Before starting the replacement process, gather the following tools and materials:

  • Replacement strimmer line: Ensure it matches the recommended diameter for your strimmer model.
  • Safety gloves: Protect your hands from sharp edges and debris.
  • Safety glasses: Guard your eyes against flying debris during the replacement.

Step 2: Power Off the Strimmer

For safety reasons, always turn off the strimmer and disconnect it from the power source or remove the battery (for cordless models) before attempting any maintenance or replacement.

Step 3: Identify the Strimmer Head Type

Different strimmer models feature various types of heads for holding and dispensing the strimmer line. The most common types include bump feed, automatic feed, and fixed-line heads. Identify the type of head your strimmer has before proceeding with the replacement.

Step 4: Remove the Old Strimmer Line

If your strimmer has any remaining old line, carefully unwind or cut it away. Take note of how much line is left, as this will give you an idea of how much replacement line you’ll need.

Step 5: Open the Strimmer Head

For bump feed heads, gently tap the bottom of the head on the ground to release more line. For automatic feed heads, open the head cover according to the manufacturer’s instructions. For fixed-line heads, follow the specific instructions for your model to access the spool.

Step 6: Remove the Spool

Once the strimmer head is open, remove the spool that holds the strimmer line. Depending on the design, you may need to unscrew a cap or press tabs to release the spool.

Step 7: Clean the Spool Area

Take a moment to clean any debris, dirt, or grass clippings from the spool area. A clean surface ensures smooth operation and prevents interference with the new strimmer line.

Step 8: Measure and Cut the Replacement Line

Using the recommended replacement strimmer line for your model, measure and cut the line to the appropriate length. Check your strimmer’s manual for guidance on the correct length and diameter.

Step 9: Load the Replacement Line

Feed one end of the replacement line through the designated hole or eyelet on the spool. Follow any directional arrows or guides to ensure the line is loaded in the correct direction.

Step 10: Secure the Replacement Line

Once the replacement line is loaded, secure the other end in the retaining slots or notches on the spool. Ensure the line is snugly fitted to prevent unraveling during operation.

Step 11: Reassemble the Strimmer Head

Carefully reinsert the spool into the strimmer head, following the manufacturer’s instructions for your specific model. For bump feed heads, ensure the line is correctly aligned, and for automatic feed heads, close the head cover securely.

Step 12: Test the Strimmer

Before returning to regular use, give the strimmer a quick test to ensure the replacement line feeds correctly and rotates smoothly.


Replacing strimmer wire is a straightforward process that, when done correctly, ensures your strimmer remains a reliable tool for keeping your lawn well-maintained. Regularly check the condition of the strimmer line, and follow these steps whenever replacement is needed. By incorporating proper maintenance into your routine, you’ll maximize the efficiency and longevity of your strimmer, ensuring it’s always ready to tackle overgrown grass and weeds with ease.

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