Stihl FS 94 Instruction Manual page 7

2 Safety Precautions and Working Techniques
type of cutting attachment being
used.
Check the work site – rocks, metal
objects etc. may be caught up and
ejected – possibly over a distance of
15 m – risk of injury! – They can also
damage the cutting attachment and
other property (e. g. parking vehicles,
windows).
Be particularly careful when working on difficult,
densely grown terrain.
When mowing in high shrubbery, under shrub‐
bery and hedges: Hold the cutting tool at a work‐
ing height of at least 15 cm – avoid risks to ani‐
mals.
Always shut off the engine before leaving the
unit unattended.
Examine the cutting attachment periodically at
short intervals and as soon as you note any
noticeable changes:
– Stop the engine, hold the machine securely,
allow the cutting attachment to come to a stop
– Check condition and secure fitting; watch out
for cracks
– Ensure that the cutting blades are sharp
– Replace damaged or blunt cutting attachments
immediately, even in the event of minor hair‐
line cracks
Clean grass and plant residue off the cutting
attachment mounting at regular intervals –
remove any build up of material from the cutting
attachment and deflector.
To reduce the risk of injury, shut off the engine
before replacing the cutting attachment.
The gearbox gets hot during opera‐
tion. Never touch the gearbox – risk
of burns!
Do not continue using or attempt to repair dam‐
aged or cracked cutting attachments by welding,
straightening or modifying the shape (out of bal‐
ance).
Particles or pieces may come off and hit the
operator or a bystander at a high speed – risk of
most severe injuries!
If a rotating cutting attachment touches a rock or
another hard object, sparks may be generated
which may possibly ignite combustible materials.
Also dried-out plants and brushwood are com‐
bustible, above all in hot and dry weather. If
there is a risk of fire, do not use cutting attach‐
ments in the vicinity of combustible materials,
0458-593-8321-C
dried-out plants or brushwood. It is mandatory
that you ask the responsible forestry office about
any fire hazard conditions.
2.8 Using mowing heads
Extend the cutting attachment deflector with the
attached parts specified in the User Manual.
Only use a deflector with a properly fitted blade,
to limit the mowing line to the permissible length.
To adjust the mowing line in manually adjustable
mowing heads, always switch off the engine first
– risk of injury!
Misuse with mowing lines that are too long
reduces the working speed of the engine. The
constant slipping of the clutch causes overheat‐
ing and damage to important components (e. g.
clutch, plastic housing parts) – e. g. due to the
cutting attachment rotating during idling – risk of
injury!
2.9 When using metal cutting
attachments
STIHL recommends the use of original STIHL
metal cutting attachments. These have been
optimized for the machine and the user's require‐
ments.
Metal cutting attachments rotate very fast, gener‐
ating forces acting on the attachments and on
the cuttings.
Metal cutting attachments must be sharpened in
regular intervals in accordance with the instruc‐
tions.
Unevenly sharpened metal cutting attachments
generate an imbalance which may cause
extreme loads on the machine – risk of break‐
age!
Dull or improperly sharpened cutting edges can
put a higher load on the cutting attachment and
increase the risk of injuryfrom cracked or broken
parts.
After each contact of the metal cutting attach‐
ment with hard objects (e.g. stones, rocks, metal
parts), check it for damage (e.g. tears and defor‐
mation). Burrs and other visible accumulated
material must be removed since it may come
loose at any time while the machine is running
and then be ejected – risk of injury!
To reduce the above-specified risks involved in
operating a metal cutting attachment, ensure that
the diameter of your metal cutting attachment is
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