You should have your lawn mower blade sharpened and balanced after about 20 to 25 mowing hours. STIHL recommends having the blade sharpened and balanced by a STIHL specialist dealer. Also, check the wear of your blade regularly, even if the cutting pattern still seems okay. The wear limit can be found in the operating instructions for the lawn mower. This allows you to react in time and achieve the best results in the long term.

For more detailed information on sharpening, please refer to the operating instructions for the lawnmower.

If your mowing result deteriorates over time, it is usually due to a blunt mower blade.

The following points must be considered during sharpening:
Safety glasses must be worn when sharpening.

1. Depending on the type of drive, remove the battery, disconnect the lawn mower from the power supply or detach the spark plug socket.
2. Remove the mowing blade.
3. Cool the blade during the sharpening process, e.g. with water. The blade must not be allowed to display blue colouring, as this would reduce its cutting quality.
4. Sharpen the mowing blade evenly to avoid vibration due to imbalance.
5. The cutting angle of 30° must be observed.
6. Observe the wear limit of your mowing blade.
7. Remove any grinding burr that may have occurred.

If you do not have the necessary expertise or auxiliary equipment, you should have the blade sharpened by a specialist dealer (STIHL recommends STIHL specialist dealers). If the mowing blade is sharpened incorrectly (incorrect sharpening angle, imbalance, etc.), the function of the machine will be impaired, in particular the cutting performance (battery run time) may be reduced and the noise emissions may increase. Vibrations can lead to premature failures of components.