How To Replace String Trimmer Head

If your string trimmer is no longer cutting the grass evenly, it might be time to replace the head. Here’s how to do it: 1) Disconnect the battery and motor from the tool 2) Remove the two screws that hold the head on (one near the side of the tool and one near the blade) 3) Lift off the head  4) Install a new head by re-installing the screws and lining up the marks

What is a string trimmer head?

A string trimmer head is the component on a string trimmer that cuts the grass. String trimmers come in a variety of shapes and sizes, but all have a string trimmer head.

How to replace a string trimmer head

Replacing the string trimmer head is a simple task that can be performed by anyone with basic tools and knowledge. The process is relatively straightforward, and most common repair tasks can be completed in just a few minutes.


  1. Disconnect the power cord from the tool.
  2. Remove the cap from the head of the string trimmer.
  3. Remove the head from the body of the tool.
  4. Inspect the inside of the head for damage or worn parts. If there is damage, discard the head and replace it with a replacement part. If there are no damaged parts, remove any burrs or other obstruction from within the head using a sharp knife or razor blade.
  5. Replace any worn or damaged parts with new ones, ensuring that they fit properly into the head and that all screws are tightened properly.
  6. Reattach the cap and power cord to the tool, replacing any screws that may have been omitted during disassembly.

Tools needed

-String trimmer head

-High-grit sandpaper

-Stainless steel blade

-Wire brush


-Ruler or a straight edge


If your string trimmer is not cutting the grass as well as it used to, it may be time to replace the head. This Instructables guide will show you how to replace a string trimmer head in just minutes.

  1. Start by removing the old string trimmer head. Place the wire brush on the side of the old head that will be facing the new one, and use it to rub the bristles along the length of the blade. This will remove any rust or corrosion from the blade.
  2. Carefully wash the new head with high-grit sandpaper and lubricant. Make sure to scrub all of the dirt and debris off of it. Once it’s clean, place it on top of the blade so that the cutting edge is facing down.
  3. Stick a ruler or a straight edge onto one end of the blade, and use it to line up the holes in the head with those on the blade. screw on both ends of the new head, making sure that they’re tight against each other.
  4. Use your hand to guide the trimmer along your grass, and watch as it effortlessly cuts through it!


If your string trimmer head needs to be replaced, there are a few different ways to go about it. You can purchase a new head directly from the manufacturer, or you can try replacing the head on your own using some simple tools and instructions. Whichever route you decide to take, be sure to read through the steps before starting so that you have a better understanding of what you’re doing.


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