IKRA BF 33 Mode D'emploi page 25

vicinity of fences or metal posts, boundary stones or foun-
dations.
For cutting thick stems position them as shown in fig. 9f
in order to avoid recoil.
Cleaning, maintenance and ordering replace-
ment parts
Cleaning
• Keep the protective equipment, air slots and motor
housing as free of dust and dirt as possible. Wipe the
device with a clean cloth or blast it with low-pressure
compressed air.
• We recommend that you clean the device immediately
after each use.
• Clean the device regularly with a damp cloth and a little
soft soap. Do not use detergents or solvents - these can
attack the plastic parts of the device. Take care that no
water gets into the device.
Maintenance
Always switch the device off before maintenance work
and remove the connector from the spark plug.
Replacing cutting line / cutting line spool
1. Unscrew the cutting line spool with the tool pro-
vided and remove the cutting line spool screw (fig.
12a/12b). Attention: Left-hand thread
2. Remove the cutting line spool from the cutting line
spool housing (fig. 12c).
3. Remove any cutting line still present.
4. Fold new cutting line in the middle and hook the loop
created into the cut-out in the spool divider. (fig. 12d)
5. Wind on the cutting line counter-clockwise whilst
holding the line taut. In doing so the spool divider
separates the two halves of the nylon cutting line. (fig.
12e)
6. Hook the last 15 cm of the two ends of the cutting
line into the cutting line spool's cutting line holders
opposite one another. (fig. 12f)
7. Feed the two ends of the cutting line through the met-
al eyes in the cutting line spool housing (fig. 12c).
8. Press the cutting line spool into the cutting line spool
housing.
9. Fasten the cutting line spool with the cutting line spool
screw (fig. 12a/12b).
10. Tug briefly on the two ends of the cutting line to loos-
en these from the cutting line spool's cutting line hold-
ers.
11. Trim any excess cutting line back to approx. 13cm.
This reduces the load on the motor during the start
and warm up.
12. Re-install the cutting line spool, see point 6.1.6. If the
complete cutting line spool has been renewed then
points 3-6 can be bypassed.
Servicing the air filter
A dirty air filter reduces the motor power by reducing the
air flow to the carburettor. Regular checking is there-
fore essential. The air filter should be checked every
25 operating hours and cleaned if necessary. If the
air is very dusty then the air filter should be checked
more frequently.
1. Remove the air filter cover (fig. 10a)
2. Remove the filter element (fig. 10b)
3. Clean the filter element by rapping it or blasting it out
with air.
4. Reassembly is carried out in reverse order.
Attention: Never clean the air filter with petrol or com-
bustible solvents.
Servicing the spark plug
Spark plug sparking gap = 0.6 mm. Tighten the spark plug
to a torque of 12 to 15 Nm. Check the spark plug for dirt
the first time after 10 operating hours and clean with a
copper wire brush if necessary. Then clean the spark plug
every 50 operating hours.
1. Pull the spark plug connector (fig. 11a) off with a turn-
ing motion.
2. Remove the spark plug (fig. 11b) with the spark plug
wrench provided.
3. Reassembly is carried out in reverse order.
Sharpening the cutting line cutter
The cutting line cutter can become blunt over time. If this
should occur then loosen the 2 screws that fasten the
cutter to the protective cover. Fasten the cutter in a vice.
Sharpen the cutter with a flat file and take care not to
change the angle of the cutting edge. File in only one
direction.
Adjusting the carburettor
Attention! Adjustments to the carburettor should only be
carried out by authorised service personnel. The air filter
covering must be removed as shown in figs. 10a and 10b
before any work on the carburettor.
Adjusting the throttle cable:
If it is no longer possible to reach the maximum motor
speed with the device after a time and all other causes
per section „Troubleshooting" have been excluded then
it may be necessary to adjust the throttle cable. Firstly,
check if the carburettor opens fully when the throttle trig-
ger is pressed fully. This is the case when the carburettor
throttle plate (fig. 13a / item A) rests against the stop (fig.
13a / item B) with the throttle trigger fully depressed. Fig.
13a shows the correct setting. If the carburettor throttle
plate does not touch the stop then readjustment is nec-
essary.
The following steps are required to readjust the throttle
cable:
• Loosen the counter nut (fig. 13b / item C) one turn.
• Unscrew the adjustment screw (fig. 13b / item D) until
the carburettor throttle plate rests against the stop as
shown in fig. 13a with the throttle trigger
• fully depressed.
• Tighten the counter nut once again.
Adjusting the idle speed:
Attention! Adjust the idle speed when the device is
warmed up and in operational condition.
If the device stalls when the throttle trigger is released
and if all other causes per section „Troubleshooting" have
been excluded then readjustment of the idle speed is
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