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Engine starts badly or
runs irregularly
Choke is closed.
Open the choke.
Air filter is dirty.
Maintain air filter (see Maintenance).
Poor quality, dirty, or old fuel.
Always use fresh fuel.
Spark plug is dirty, damaged, or
incorrect electrode gap.
Clean spark plug and check electrode
gap (see Maintenance). Replace spark
plug if necessary.
Wrong spark plug connector.
Use the specified spark plug connector
(see spare part information of the au-
thorised service centre).
Decompression bore is
blocked.
Authorised service centre.
No drive when drive
lever is actuated
Drive belt is insufficiently ten-
sioned.
See also Checking the drive.
The blade does not
rotate
V-belt is insufficiently tensioned
or damaged.
Authorised service centre.
Bowden cable is defective.
Authorised service centre.
Strong vibrations
during operation
Imbalance of the blade caused
by incorrect sharpening or
chips on the blade.
Have blade resharpened and balanced
by an authorised service centre. Re-
place a damaged blade immediately.
Blade drive shaft is bent due to
collisions with foreign objects.
Authorised service centre.
Engine fastening is loose.
Authorised service centre.
Blade fastening is loose.
Authorised service centre.
Irregular noises
Loose fastening elements.
Authorised service centre.
Silencer is defective.
Authorised service centre.
Engine gets hot
Ventilation grid is dirty.
Clean ventilation grid.
Cooling fins of the engine are
dirty.
Have cooling fins cleaned by authorised
service centre.
Engine is smoking
Air filter is dirty or drenched
with oil.
Maintain or replace air filter (see
chapter Maintenance).
Oil level is too high.
Have authorised service centre lower
the oil level to the marking.