Stihl BT 121 Instruction Manual page 7

Your power tool produces
toxic exhaust fumes as
soon as the engine is
running. These fumes
may be colorless and
odorless and contain
unburned hydrocarbons
and benzol. Never run
the engine indoors or in
poorly ventilated loca-
tions, even if your model
is equipped with a cata-
lytic converter.
To reduce the risk of serious or fatal
injury from breathing toxic fumes,
ensure proper ventilation when working
in trenches, hollows or other confined
locations.
To reduce the risk of accidents, stop
work immediately in the event of
nausea, headache, visual disturbances
(e.g. reduced field of vision), problems
with hearing, dizziness, deterioration in
ability to concentrate. Apart from other
possibilities, these symptoms may be
caused by an excessively high
concentration of exhaust gases in the
work area.
Operate your power tool so that it
produces a minimum of noise and
emissions – do not run the engine
unnecessarily, accelerate the engine
only for cutting.
The dusts (e.g. sawdust), vapor and
smoke produced during operation may
be dangerous to health. If dust levels are
very high, wear a suitable respirator.
To reduce the risk of fire, do not smoke
while operating or standing near your
power tool. Note that combustible fuel
vapor may escape from the fuel system.
BT 121
If your power tool is subjected to
unusually high loads for which it was not
designed (e.g. heavy impact or a fall),
always check that it is in good condition
before continuing work – see also
"Before Starting". Check the fuel system
in particular for leaks and make sure the
safety devices are working properly. Do
not continue operating your power tool if
it is damaged. In case of doubt, have the
machine checked by your servicing
dealer.
Do not operate your power tool with the
starting throttle lock engaged – engine
speed cannot be controlled in this
position.
To reduce the risk of injury, do not touch
the auger or drilling spindle unless the
engine is stopped and the auger is at a
standstill.
Avoid contact with electri-
cal cables or wires – risk
of electric shock.
Hold the machine firmly in order to
control sudden jolts and reactive forces
– keep feed pressure relatively low.
Work particularly care-
fully in rocky ground or
ground with a heavy root
structure.
Cover and clearly mark boreholes.
To reduce the risk of injury, shut off
the engine and engage the auger brake
before changing the auger.
To avoid serious burn injuries, avoid
touching hot parts of the machine,
especially the muffler.
Before leaving the power tool
unattended: Shut off the engine.
Check condition of augers regularly.
Replace damaged or dull augers
immediately.
Vibrations
Prolonged use of the power tool may
result in vibration-induced circulation
problems in the hands ("white finger
disease").
No general recommendation can be
given for the length of usage because it
depends on several factors.
The period of usage is prolonged by:
– Hand protection (wearing warm
gloves)
– Work breaks
The period of usage is shortened by:
– Any personal tendency to suffer
from poor circulation (symptoms:
frequently cold fingers, tingling
sensation)
– Low outside temperatures
– Amount of gripping force (holding
the power tool tightly restricts
circulation)
Users who use the machine periodically
or for long periods or users who
repeatedly experience corresponding
symptoms (e.g., tingling sensation in
fingers), should undergo a medical
examination.
English
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