25
GB
8. Pull the two line ends sharply to release them
from the line holders in the line spool.
9. Cut the excess line to a length of around 13cm.
This will reduce the load on the engine when
starting and warming up.
10. Refit the line spool (see section 6.1.6).
11. If you are replacing the complete line spool, skip
points 3-6.
8.2 Servicing the air filter
Soiled air filters reduce the engine output by supply
too little air to the carburetor. Regular checks are
therefore essential. The air filter (35) should be
checked after every 25 hours of use and cleaned if
necessary. If the air contains a lot of dust, the air filter
should be checked more frequently.
1. Remove the air filter cover (Fig. 10a).
2. Remove the air filter (Fig. 10b/10c)
3. Clean the air filter by tapping it or blowing it.
4. Assemble in reverse order.
Important: Never clean the air filter with petrol or
inflammable solvents.
8.3 Maintenance of the spark plug
Spark plug sparking gap = 0.6mm. Tighten the spark
plug with a torque of 12 to 15 Nm. Check the spark
plug for dirt and grime after 10 hours of operation and
if necessary clean it with a copper wire brush.
Thereafter service the spark plug after every 50 hours
of operation.
1. Dismantle the protective cap (Fig. 11a/Item 21)
using a screwdriver.
2. Pull off the spark boot plug (Fig. 11b).
3. Remove the spark plug (Fig. 11b) with the
supplied spark plug wrench (27).
4. Assemble in reverse order.
8.4 Grinding the safety hood blade
The safety hood blade can become blunt over time.
When you notice this, undo the two screws holding
the safety hood blade to the safety hood. Clamp the
blade in a vise. 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.
8.5 Carburetor settings
Important. Settings on the carburetor may only be
made by authorized customer service personnel.
The air filter cover must be removed before any work
on the carburetor, as shown in Figures 10a and 10c.
Setting the throttle cable
If the maximum speed of the equipment falls over
time and you have ruled out all the other causes listed
in section 11 Troubleshooting, it may be necessary to
adjust the throttle cable.
First of all check whether the carburetor opens fully
when the throttle handle is pressed fully. This is the
case if the carburetor slide (Fig. 13a) is completely
opened when the throttle is fully activated.
Figure 13a shows the correct setting. If the carburetor
slide is not completely open, it must be adjusted.
The following work is required to adjust the throttle
cable:
n Undo the lock nut (Fig. 13b/Item C) a few turns.
n Undo the adjusting screw (Fig. 13b/Item D) until
the carburetor slide is completely open when the
throttle is fully activated, as shown in Figure 13a.
n Retighten the lock nut.
Setting the idling speed
Important. Set the idling speed when the equipment
is warm.
If the engine stalls when the throttle is not pressed
and you have ruled out all the other causes listed in
section 11 Troubleshooting, the idling speed must be
adjusted. To do this turn the idling speed screw (Fig.
13b/Item E) clockwise until the equipment runs
smoothly at idling speed. If the idling speed is so fast
that the cutting tool turns as well, it has to be reduced
by turning the idling speed screw for as long as is
required for the cutting tool to stop turning as well.
8.6 Changing the oil and checking the oil level
(before using the equipment)
The motor oil is best changed when the motor is at
working temperature. In this connection, please also
read the service information.
n Keep a suitable, leak-tight receptacle within reach
when performing an oil change.
n Open the oil filler plug (Fig. 14a-14b / Item 38).
n Drain the used oil into a suitable receptacle by tilting
the engine.
n Fill in engine oil (15W40) up to the top mark (Max.)
on the oil dip stick (Fig. 14b).
n Dispose of the used oil properly by taking it to a
collection point. Most filling stations, repair garages,
and recycling centers will accept used oil free of
charge. Do not add antifreeze or transmission fluid
to the used oil. Keep used oil out of the reach of
children and away from sources of ignition.
8.7 Environmental protection
Dispose of soiled maintenance material and
operating materials at the appropriate collection point.
Recycle packaging material, metal and plastics.
