How To String Up A Stihl Weedeater Fs 40 C

How To Articles

As a seasoned lawn care enthusiast, I understand the importance of properly stringing up a Stihl weedeater FS 40 C for smooth and efficient trimming. It can be a bit tricky, but with the right guidance, you’ll be able to handle it like a pro. Here’s a step-by-step guide, with some personal insights, to help you master this essential task.

Gather the Necessary Tools

Before getting started, I always make sure to have all the tools I need within reach. For this task, you’ll need the following:

  • Stihl weedeater FS 40 C
  • Replacement trimmer line
  • Work gloves
  • Safety goggles

Prepare the Weedeater

First, ensure the weedeater is turned off and place it on a flat surface for stability. If there’s any remaining old trimmer line, I carefully remove it, making sure not to damage the spool.

Access the Spool

Locate the spool on the bottom of the Stihl weedeater FS 40 C. To access it, I press the tabs on the side and carefully remove the spool cover. This allows me to access the spool and the old trimmer line.

Remove the Old Trimmer Line

With the spool in hand, I carefully unwind the old trimmer line. It’s important to take note of how the old line was wound around the spool as it serves as a guide for the new line.

Stringing the New Line

Next, I take the replacement trimmer line and cut it to the appropriate length according to the manufacturer’s recommendations. Then, I insert the line into the small eyelet on the side of the spool and start winding the line in the direction indicated by the arrows on the spool. I make sure to keep the line snug and evenly distributed around the spool.

Secure the Line

Once the spool is full and the line is properly wound, I secure the end of the line in the notch on the spool, ensuring it’s held in place. Then, I carefully place the spool back into the head, making sure the line feeds through the holes correctly.

Reassemble and Test

Finally, I carefully reattach the spool cover, making sure it clicks into place. With everything back together, I start up the weedeater and test the newly strung trimmer line to ensure it feeds out smoothly and at the right length.


Stringing up a Stihl weedeater FS 40 C may seem daunting at first, but with practice, it becomes second nature. By following these steps and adding your personal touches, you’ll soon be tackling your lawn maintenance tasks with confidence and precision.