English Operating manual for engine
8
Checking the oil
Before starting the engine, always
check the oil level.
Ensure that the correct oil level is
always maintained.
See “Checking the oil level”.
Changing the oil
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Fig. 4
Remove the oil filler cap (1).
Drain the oil into a suitable
container by:
– Open the oil drain plug (2) or (3)
– depending on model
or
– tilting the unit on its side (air
filter side face up).
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Screw in the oil drain plug
(if removed) and tighten.
Fill the oil tank with the
recommended oil and check the
oil level.
Re-attach the oil filler cap.
Important
Dispose of waste oil according to
the currently valid regulations for the
protection of the environment. It is
recommended to take the waste oil
in a leakproof container to a waste
oil collection centre. Do not dispose
of with residual waste or pour onto
the ground and leave to seep away.
Servicing the air filter
A dirty air filter restricts the air flow to
the carburettor. To prevent the
carburettor from malfunctioning, the
air filter should be cleaned/replaced
regularly. In an extremely dusty
environment more frequent
maintenance may be required.
A paper filter cannot be cleaned and
must be changed according to the
maintenance interval.
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Fig. 5
Type A:
Turn air filter cover (1) anti-
clockwise (to the left) and pull out
backwards.
Remove paper filter element (3).
Clean air filter cover (1) and
mounting flange (4).
Fit new paper filter element in the
air filter cover.
Press retaining plates (2) of the air
filter cover into the retaining slots
(5) of the mounting flange and turn
all the way clockwise (to the right).
Ensure that the air filter cover is
positioned correctly!
Type B:
Press on the retaining plates (2) of
the air filter cover (1) and remove
cover.
Remove paper filter element (3).
Gently tap the paper element
several times on a hard surface to
remove dirt or blow out dirt with
compressed air from inside
through the filter. Never attempt to
brush out dirt; the dirt would only
be rubbed permanently into the
fibres. Replace the paper element
if it is excessively dirty.
Re-insert paper filter element.
Attach cover:
– Press lower retaining plates of
the air filter cover into the lower
retaining slots of the air filter
housing (4).
– Press air filter cover upwards
until the upper retaining
plates (2) engage in the upper
retaining slots (5).
Ensure that the air filter cover is
positioned correctly!
Servicing the spark plug
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To ensure that the engine runs
correctly, the gap between the
electrodes on the spark plug must
be set correctly and free of
contaminants.
Fig. 6
Remove the spark plug terminal (1)
and unscrew the spark plug (2)
with a spark-plug wrench.
Visually check the spark plug.
Replace the spark plug if it is
clearly worn or the insulator is
damaged.
Clean the spark plug with a wire
brush if it is to be used again.
Measure the gap between the
electrodes with a feeler gauge.
If required, re-adjust the gap by
slightly bending the side
electrode. The gap between the
electrodes should be
0.70–0.80 mm (Fig. 7).
Check that the sealing ring on the
spark plug is in good condition,
then screw in the spark plug by
hand to prevent damage to the
thread.
When the spark plug is hand-tight,
tighten with the spark-plug
wrench.
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