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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.
Checking and charging the battery
Warning
Explosion hazard
When the battery is charged, explosive
gases are generated. An explosion of the
battery can result in injuries and blindness.
► Keep open flames and ignition sources
away and do not smoke.
► Charge the battery only in well ventilated
rooms.
Warning
Danger of chemical burn
Batteries contain acids. Contact with battery
acid can result in blindness or serious
burns.
► Always keep the battery upright and do
not spill any battery acid.
► Avoid contact with skin and eyes.
► If battery acid comes into contact with
eyes, immediately rinse the eyes with
water.
Warning
When you work on the battery, there is a
risk of short circuit.
► Do not put any tools or metal objects
onto the battery.
► When disconnecting and connecting the
battery, observe the order of assembly
steps.
If the starter does not get the engine going or
only insufficiently, charge the battery.
The battery is maintenance-free and gas-tight.
For charging the battery, you require a special
charging system. Battery chargers for car bat-
teries are not suitable!
The charging current must not exceed the
maximum of 3 ampere, otherwise, the bat-
tery heats up too much!