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No drive when drive
lever is actuated
The blade does not
rotate
Strong vibrations
during operation
Irregular noises
Engine is smoking
Engine gets hot
Uneven cut, lawn
becomes unsightly
Spark plug is sooted, dam-
aged, or incorrect electrode
gap.
Housing of the mower is
jammed.
Drive belt is insufficiently
tensioned.
V-belt is insufficiently ten-
sioned or damaged.
Bowden cable is defective.
Unbalance at the blade
caused by incorrect sharpen-
ing or chips on the blade.
Blade drive shaft is bent due
to collisions with foreign ob-
jects.
Engine fastening is loose.
Blade fastening is loose.
Loose fastening elements.
Silencer is defective.
Air filter is soiled or drenched
with oil.
Oil level is too high.
Ventilation grid is dirty.
Oil level in the engine is too
low.
Cooling fins of the engine are
dirty.
Blade is dull or worn.
Speed is too high proportion-
ately to the cutting height.
Housing of the mower is
heavily contaminated.
Clean spark plug and check electrode
gap (see also Maintenance and clean-
ing). Replace spark plug if necessary.
See also Maintenance and cleaning.
Authorised service centre
Authorised service centre.
Authorised service centre.
Have blade resharpened and balanced
by an authorised service centre. Re-
place a damaged blade immediately.
Authorised service centre.
Authorised service centre.
Authorised service centre.
Authorised service centre.
Authorised service centre.
Maintain or replace air filter (see also
Maintenance and cleaning).
Have authorised service centre lower
the oil level to the marking.
Clean ventilation grid.
Refill engine oil (see operating instruc-
tions of the engine manufacturer).
Have cooling fins cleaned by author-
ised service centre.
Have blade resharpened and balanced
by an authorised service centre. Re-
place a damaged blade immediately.
Reduce speed and/or select the cor-
rect cutting height.
Clean.
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