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Maintenance specifically for
4-stroke device
Maintaining the engine
Caution
If the speed is set too high, objects can be
ejected. The engine can be damaged and a
higher level of noise pollution is produced.
► Do not change the basic setting of the
carburetor or the speed control.
The engine manufacturer has prepared the op-
erating manual of the engine. The manual con-
tains all maintenance requirements and war-
ranty conditions for the engine. If warranty
work on the engine is required, contact your
authorised service centre or the next author-
ised dealer for engines.
To ensure a long service life of the engine, suf-
ficient engine cooling is required.
Keep the
- engine cover (ventilation grid),
- silencer (protective grid) and
- cooling fins of the engine
clean at all times.
Checking the engine oil level
Never allow the oil level to be too low other-
wise the engine can be damaged. Never fill in
too much oil. Otherwise, there is the risk that
the oil enters and destroys the air filter.
For this, observe the attached operating in-
structions of the engine.
Checking the spark plugs
Danger
The ignition system generates an electro-
magnetic field.
► Wearers of pacemakers must not work
on live parts.
Soiled spark plugs reduce the engine output.
Clean the electrode of the spark plug with a
brass wire brush. Check the electrode gap
(see operating instructions of the engine manu-
facturer). Make sure that the insulator around
the electrode is not damaged. Never use a
damaged spark plug.
Tighten the spark plug using the correct torque
(see operating instructions of the engine manu-
facturer).
Maintaining the air filter
Warning
There is a fire and explosion risk due to
cleaning agents.
► Never clean the air filter with flammable
solvents.
Make sure that the air filter is always clean. A
dirty air filter reduces the engine power and
leads to increased engine wear and fuel con-
sumption. Independent of the operating hours,
change the filter insert at least once a year. Do
not operate the engine without air filter.
For this, observe the attached operating in-
structions of the engine.
