AL-KO 127433, Manual, Page: 53 / 752

2500126_a 53
Maintenance and care
10.3 Checking/replacing fuel filter (14)
The felt-like fuel filter is located in the fuel tank
and is plugged onto the vacuum head. If the fuel
filter becomes hard, dirty or clogged, less petrol
flows to the engine. In this case, the fuel filter
must be replaced.
It is recommended that an authorised service
workshop carries out this work.
1. Preparing the appliance:
■
To empty the fuel tank: Allow the engine
to run until it stops itself.
■
Place the appliance on a level, horizontal
surface. The cap (14/1) of the fuel tank
(14/2) must be facing upwards.
■
Wipe the fuel tank cap, the fuel tank and
the surrounding appliance parts clean so
that no dirt can get into the fuel tank.
2. Checking/replacing the fuel filter:
■
Unscrew the cap (14/1) of the fuel tank
(14/2). Leave the cap hanging on the fuel
tank.
■
Use a wire hook to pull the intake head
(14/3) out of the fuel tank.
■
Inspect the fuel filter (14/4). If the felt has
become hard, dirty or clogged: Pull off
the fuel filter and push a new fuel filter
onto the intake head.
3. Push the intake head into the fuel tank again.
4. Mix and pour in the petrol/oil mixture (see
chapter 5.2 "Mixing and pouring in the petrol/
oil mixture (08)", page 47
).
10.4 Adjusting Bowden cables (15)
WARNING!
Rotating cutting tool.
Serious injury can be
caused by the rotating cut-
ting tool.
■
Only adjust the Bowden
cables with the motor
switched off.
■
Only perform the func-
tion test when the trim-
mer is horizontal.
The Bowden cables of the trimmer were correctly
set by the manufacturer. If the position of the
“Bike” handle is changed significantly, this can re-
sult in extension of the Bowden cable, leading to
a problem with the throttle lever function. This
means the cutting tool does not stop after the en-
gine has been started and the half throttle lock
unlocked.
1. Turn the set screw (15/1) to shorten or
lengthen the Bowden cable (15/2).
2. Briefly press start engine as well as the throt-
tle lever for the half throttle lock to engage.
(see
chapter 6.3.1 "Starting the engine",
page 48 ).
3. Check that the cutting tool comes to a stand-
still. If not: Repeat the setting.
10.5 Maintaining the spark plug (16)
1. Removing the spark plug:
■
Remove the spark plug connector (16/1).
■
Unscrew the spark plug (16/3) using a
spark plug spanner (16/2).
2. Assessing the condition of the spark plug:
■
If the spark plug is reddish-brown: The
engine is working correctly and the spark
plug is in order. If necessary: Carefully
brush the spark plug clean using a fine
wire brush (16/4).
■
If the spark plug is sooty, oily, encrusted,
melted or bridged: The spark plug is de-
fective. Replace the spark plug with a
new spark plug. Use the specified spark
plug type (see
chapter 11 "Technical da-
ta", page 56 ).
■
If, after a short period of operation, the
spark plug is defective again, the engine
and the carburettor settings must be
checked by an authorised service work-
shop.
3. Check the electrode spacing:
■
Use a feeler gauge (16/5) to check that
the electrode gap (16/6) is 0.6 – 0.7 mm.
If not, carefully tap the electrodes closer
together or carefully bend them apart.