8.3 Grass catcher box
Attaching:
● Open the discharge flap (1) and
hold it open.
● Attach the grass catcher box (2) to the
mountings (3) on the rear of machine by
means of the locating lugs.
● Close the discharge flap (1).
Detaching:
● Open the discharge flap (1) and hold it
open.
● Lift the grass catcher box (2) and
remove it rearwards.
● Close the discharge flap (1).
8.4 Central cutting height
adjustment
Six different cutting heights can be
set.
Level 1 = 25 mm
Level 6 = 75 mm
Setting the cutting height:
● Hold the handle (1), pull the lever (2)
upwards and hold.
● Set the required cutting height by
moving the machine upwards and
downwards. The current cutting height
can be read off at the cutting height
indicator (3) by means of the
marking (4).
● Release the detent lever (2) and allow it
to engage.
0478 121 9921 A - EN
8.5 Level indicator
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The flow of air generated by the
blade raises level indicator (1). The
flow of air stops when the grass catcher
box is full. If the flow of air is too low, level
indicator (1) returns to its resting state.
This is a prompt to empty the grass
catcher box.
The functionality of the level indicator is
restricted if the flow of air is impaired.
External influences such as wet, dense or
high grass, low cutting levels,
contamination or the like can impair the
flow of air and the functionality of the level
indicator.
A Grass catcher box is being filled
B Grass catcher box is filled
● Empty the filled grass catcher box
(
11.5).
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9. Notes on working with the
machine
9.1 General points
Risk of injury!
Untangle any knots in the cable
immediately.
Guide the electric cable behind you
when mowing. Electric cables can
be inadvertently cut when mowing
and present a tripping hazard. They
therefore involve a high accident
risk. For this reason, mow so that
the electric cable is always visible
in the area of grass that has already
been cut.
To ensure a perfect, thick lawn, mow
regularly and keep the grass short.
Do not cut the lawn too short in hot, dry
conditions as it will dry out or burn in the
sun and become unsightly.
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The cutting pattern will be better with a
sharp blade than with a blunt one; the
blade should therefore be sharpened
regularly (STIHL specialist dealer).
9.2 Correct motor load
Do not switch on the lawn mower in tall
grass or at the lowest cutting height.
The lawn mower load must never cause
the motor speed to drop significantly.
If the speed drops, select a higher cutting
height setting and/or reduce the rate of
feed.
9.3 If the mowing blade blocks
Switch off the motor immediately and
disconnect the mains plug. Then eliminate
the cause of the fault.
9.4 Thermal motor overload protection
If an overload of the motor occurs during
operation, the built-in thermal overload
protection device automatically switches
off the motor.
Causes for an overload:
– mowing excessively high grass or
cutting height adjusted too low,
– excessive rate of feed,
– inadequate cleaning of the cooling air
guide (inlet slots),
– mowing blade is blunt or worn,
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