Adjusting The Carburettor; Adjusting The Throttle Cable; Storage And Transportation - IKRA BF 25 Mode D'emploi

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 combu-
stible 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 tur-
ning 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 11 „Troubleshooting" have been excluded
then it may be necessary to adjust the throttle cable.
Firstly, check if the carburettor opens fully when the
throttle trigger 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 car-
burettor throttle plate does not touch the stop then read-
justment is necessary.
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 war-
med up and in operational condition.
If the device stalls when the throttle trigger is released
and if all other causes per section 11 „Troubleshooting"
have been excluded then readjustment of the idle speed
is necessary. To do so turn the idle speed screw (fig. 13b /
item E) clockwise until the device runs smoothly at idle. If
the idle speed is set so high that the cutting tool also turns
then the idle speed must be reduced by turning the idle
screw counter-clockwise until the cutting tool no longer
turns along with the motor.
Ordering spare parts
When ordering replacement parts the following informati-
on should be provided;
• Device type
• Device article number
• Device ident. number
• Replacement part number of the replacement part re-
quired

Storage and transportation

Storage
Caution: Do not store the device for more than 30 days
without carrying out the following steps.
Storing the device
If the device is to be stored for more than 30 days then it
must be prepared for this. Otherwise the residual fuel in
the carburettor will evaporate leaving a rubber-like depo-
sit behind. This can make starting difficult and can result
in expensive repair costs.
1. Take the fuel tank cap off slowly to dissipate any pres-
sure in the tank. Carefully empty the tank.
2. Start the motor and let it run until it stops in order to
use up all the fuel remaining inside the carburettor.
3. Let the motor cool down (ca. 5 minutes).
4. Remove the spark plug (see 8.3)
5. Feed 1 teaspoon of clean 2-stroke oil into the com-
bustion chamber. Pull the starter cord slowly several
times in order to coat the internal components. Re-
insert the spark plug.
Note: Store the device in a dry location and far away from
possible sources of ignition, e.g. stoves, gas hot water
boilers, gas driers etc.
Re-commissioning
1. Remove the spark plug (see 8.3)
2. Pull the starter cord quickly in order to remove any
excess oil in the combustion chamber.
3. Clean the spark plug and check the spark gap is cor-
rectly set, or insert a new spark plug with the correct
spark gap.
4. Prepare the device for operation.
5. Fill the tank with the correct fuel/oil mixture. See fuel
and oil section.
GB-8