Stihl MS 391 Safety Manual page 6

English
The machine is operated by only one
person – there should not be any other
person within the working area – not
even when starting the machine.
Lock the chain with the chain brake
before starting – risk of personal injury
due to rotating chain!
Do not drop-start the engine – start as
described in the Instruction Manual.
Do not start the chain saw if the chain is
in a cut.
During work
In the event of impending danger or in
an emergency, switch off the engine
immediately by moving the Master
Control/stop switch to STOP or 0.
Never let the machine run unattended.
When the engine is running: Note that
the chain continues to rotate for a short
period after your let go of the throttle
trigger – coasting effect.
Exercise caution with slippery surfaces,
water, snow, ice, steep slopes, uneven
ground or green wood that has just been
stripped of its bark –danger of slipping!
Use caution with tree stumps, roots,
ditches – danger of stumbling!
Ensure you always have a firm and safe
footing.
Do not work alone – keep within calling
distance of others in case help is
needed.
More care and attention than usual are
required when wearing ear protection,
since warning sounds (shouts, alarms,
etc.) cannot be heard properly.
4
Take breaks in due time in order to
prevent tiredness and exhaustion – risk
of accidents!
Keep easily combustible materials (e.g.,
wood chips, bark, dry grass, fuel) away
from hot exhaust gases and hot mufflers
– risk of fire! Mufflers with catalytic
converters can become especially hot.
Your power tool produces
toxic exhaust fumes as
soon as the engine is
running. These gases
may be colorless and
odourless and may con-
tain unburnt
hydrocarbons and ben-
zene. Never run the
engine indoors or in
poorly ventilated areas,
even if your model is
equipped with a catalytic
converter.
Ensure proper ventilation when working
in trenches, hollows or other confined
areas. Toxic fumes can kill!
If you feel sick, if you have a headache,
vision problems (e.g., your field of vision
gets smaller), hearing problems,
dizziness or inability to concentrate, stop
work immediately. Such symptoms may
be caused by an excessively high
concentration of exhaust emissions –
risk of accident!
Dust (e.g., sawdust), fumes and smoke
produced while using the machine may
be hazardous to health. Wear a dust
mask if dust is generated.
No smoking when working with or near
the machine - risk of fire! Combustible
fuel vapor may escape from the fuel
system.
If the machine 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 - refer also to the
section "Before starting". Check the fuel
system for leaks and make sure the
safety devices are working properly.
Never continue using a power tool that is
not in perfect working order. Consult a
STIHL dealer if in doubt.
Make certain that the saw chain does
not continue rotating when the engine is
idling – if necessary, correct the low
speed setting – if the chain continues to
keep rotating in idle, have it checked by
a servicing dealer.
Reactive forces
The most common reactive forces are:
kickback, pushback and pull-in.
Dangers of kickback
Kickback can result in
fatal cuts.
Chain Saw Safety Manual