Stihl MS 661 C-M Instruction Manual page 18

English
– STIHL recommends that first-time chain saw users
work under the supervision of an experienced
operator.
5.6.4 Working Conditions
WARNING
￭ Operate your chain saw only under good visibility during
favorable daylight conditions.
– Postpone the work if the weather is windy, foggy,
rainy or inclement.
– Never cut near power lines.
￭ Your chain saw is a one-person machine.
– Do not allow other persons in the general work area.
– Bystanders, especially children, and animals should
not be allowed in the area where it is in use.
– Shut off the engine immediately if you are
approached. Engage the chain brake.
￭ To reduce the risk of injury to bystanders and
unauthorized users:
– Never leave the chain saw unattended when the
engine is running.
– Shut off the engine and engage the chain brake
during work breaks and any other time the chain saw
is not in use.
￭ To reduce the risk of fire and explosion:
– Never operate the chain saw in a location where
combustible gases, liquids, vapors, dusts or other
combustible materials and substances are present.
– Always move the Master Control Lever to stop
position and hold it in this position before pulling
the starter grip if the spark plug boot has been
removed.
– Read and follow recommendations issued by
government authorities for identifying and avoiding
the hazards of combustible gases, liquids, vapors,
dusts or other combustible materials and
substances.
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5 IMPORTANT SAFETY INSTRUCTIONS
– Never modify the chain saw muffler or spark
arresting screen.
￭ If a rotating chain strikes a rock or other hard object,
sparks may be created, which can ignite flammable
materials under certain circumstances. Flammable
materials can include dry vegetation and brush,
particularly when weather conditions are hot and dry.
– When there is a risk of fire or wildfire, do not use your
chain saw around flammable materials or around dry
vegetation or brush.
– Contact your local fire authorities or the Canadian
Forest Service if you have any question about
whether vegetation and weather conditions are
suitable for the use of a chain saw.
￭ As soon as the engine is running, it generates toxic
exhaust gases containing chemicals, such as unburned
hydrocarbons (including benzene) and carbon monoxide,
that are known to cause respiratory problems, cancer,
birth defects, or other reproductive harm. Some of the
gases (e. g. carbon monoxide) may be colorless and
odorless. To reduce the risk of serious or fatal injury or
illness from inhaling toxic exhaust gases:
– Never operate the chain saw indoors, in
confined spaces or other poorly
ventilated locations.
– If exhaust fumes become concentrated
due to insufficient ventilation, clear
obstructions from the work area. Ensure
proper ventilation before proceeding.
￭ Using this chain saw and sharpening its chain can
generate dust, oil mist and other substances containing
chemicals known to cause respiratory problems, cancer,
birth defects and other reproductive harm.
– Consult governmental agencies such as ECCC,
CCOHS and PHAC and other authoritative sources
on hazardous materials if you are unfamiliar with the
risks associated with the particular substances you
are cutting or with which you are working.
￭ Inhalation of certain dusts, especially organic dusts such
as mold or pollen, can cause susceptible persons to have
an allergic or asthmatic reaction. Substantial or repeated
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