How to Put a Blade on a Stihl Weed Trimmer

Many Stihl weed eaters have interchangeable cutter heads that allow you to switch from stringed cutters to blade cutters. Blade cutters are used on thick brush where string would easily break. Stihl weed eaters are designed for this conversion, so the process is relatively straightforward.

Locking pin (suppled with the weed eater)
Sthil cutter blade
Sthil cutter blade shroud

Instructions

- 1
  Place the Stihl weed eater upside down so you can easily access the black cutter head assembly.
- 2
  Push the locking pin into the side of the cutter shaft and rotate the cutter head until the locking pin locks in place.
- 3
  Remove the plastic knurled bump-down button from the cutter head assembly by turning it clockwise.
- 4
  Pull the string spool off the shaft.
- 5
  Remove the nut that holds the spool cover onto the shaft with a wrench and then pull the cover off the shaft.
- 6
  Place the blade shroud onto the trimmer shaft, then place the blade onto the trimmer shaft.
- 7
  Secure the blade and the shroud onto the trimmer shaft with the nut you previously removed.
- 8
  Remove the locking pin from the cutter shaft.

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