75
- Sharpen the blade with a flat file and make sure that the angle of the cutting edge is not
altered in the process. File in one direction only.
Replacing and resharpening the cutting blade at the end of the mowing season
Always resharpen the cutting blade or, if required, replace the cutting blade with a new one.
Unbalanced blades will cause the brush cutter to vibrate violently – risk of accident!
Change and clean the spark plug. Fig. 30-31
Check the spark plug air gap at least once a year or when the engine starts poorly. The cor-
rect gap between ignition flag and ignition contact is 0.63 mm.
- Wait until the engine has cooled down completely.
- Pull the spark plug cap off the spark plug, and use the supplied spark plug wrench to
remove the spark plug by turning.
- When the electrode is severely worn out or reveals a strong incrustation, the spark plug
must be replaced with an equivalent plug.
- A strong incrustation of the spark plug can be caused by: Amount of oil is too high in the
gasoline mix, poor oil quality, old gasoline mix, or plugged up air filter.
- Screw the spark plug by hand completely into the thread. (Avoid jamming it)
- Use the supplied spark plug wrench to tighten the spark plug.
- When using a torque wrench, the tightening torque is 12-15 Nm.
- Plug the spark plug socket correctly on the plug.
Clean the air filter. Fig. 32-35
Soiled air filters reduce the engine power by supplying too little air to the carburetor. Dust
and pollen plug up the pores of the filter made of foamed plastic. Regular checks are there-
fore essential.
- Unclip the air filter cover and remove the sponge filter element.
- To avoid objects falling into the air tank, replace the air filter cover.
- Wash the filter element in warm soap water, rinse and allow drying naturally.
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