Stihl MS 500i Instruction Manual page 7

4 Safety Precautions
► Avoid contact with fuel, gasoline and two-
stroke engine oil.
► In case of contact with the skin: Wash affec‐
ted areas with plenty of water and soap.
► In case of contact with the eyes: Rinse eyes
with plenty of water for at least 15 minutes
and seek medical advice.
■ The saw's ignition system produces sparks.
Unconfined sparks may cause a fire or an
explosion in an easily combustible or explo‐
sive environment. This can result in serious or
fatal injuries and damage to property.
► Use the spark plugs described in this instruc‐
tion manual.
► Insert and tighten down the spark plug.
► Connect the spark plug boot and press it
down firmly.
■ The saw can be damaged if it is run on a fuel
mixture consisting of unsuitable gasoline or an
unsuitable two-stroke engine oil or if an incor‐
rect mix ratio of gasoline and two-stroke
engine oil is used.
► Mix the fuel as described in this instruction
manual.
■ The mixture of gasoline and two-stroke engine
oil can separate if it is stored for a long period.
The saw can be damaged if it is used with a
fuel mix that has separated.
► Before refueling the saw: Thoroughly mix the
fuel.
► Use a mixture of gasoline and two-stroke
engine oil that is not older than 30 days
(STIHL MotoMix: 2 years).
4.8 Working
4.8.1 Cutting
WARNING
■ Always work within calling distance of others
in case help is needed.
► Make sure than persons outside the work
area are within calling distance.
■ If the engine is not started properly, the user
may lose control of the chainsaw. This can
result in serious injuries.
► Start the engine as described in this instruc‐
tion manual.
► If the saw chain is touching the ground or
objects: Do not start the engine.
■ The user cannot concentrate on the work in
certain situations. The user can lose control of
the saw, stumble or fall and be seriously
injured.
► Work calmly and carefully.
0458-809-0121-B. VA0.A21.
► If light and visibility are poor: Do not use your
saw.
► Operate the chainsaw alone.
► Do not work above shoulder height.
► Watch out for obstacles.
► Stand on the ground while working and keep
a good balance. If it is necessary to work at
heights: Use a lift bucket or a safe platform.
► If you begin to feel tired: Take a break.
■ Exhaust gas is produced when the engine is
running. Breathing in exhaust gas can have
toxic effects.
► Avoid inhaling exhaust gas.
► Operate the chainsaw is a well ventilated
location.
► In the event of nausea, headache, visual dis‐
turbances, problems with hearing or dizzi‐
ness: Stop work and seek medical advice.
■ The user's ability to hear and assess noises is
restricted when wearing hearing protection
with the engine running.
► Work calmly and carefully.
■ Do not accelerate the engine with the chain
brake engaged since this can damage the
chain brake.
► Disengage the chain brake before you start
cutting.
■ The rotating saw chain can cut the operator.
This can result in serious injuries.
► Do not touch the rotating saw chain.
► If the saw chain is blocked by an object: Shut
off the engine and engage the chain brake.
Then remove the object causing the block‐
age.
■ The rotating chain becomes hot and expands.
If the chain is not lubricated sufficiently and re-
tensioned at regular intervals, it man come off
the guide bar or break. This can result in seri‐
ous injuries and damage to property.
► Use special chain oil.
► Check chain tension regularly during cutting
work. If chain tension is insufficient: Tension
the chain.
■ If the behavior of the saw changes during
operation or feels unusual, it may no longer be
in a safe condition. This can result in serious
injuries and damage to property.
► Stop work and contact your STIHL dealer for
assistance.
■ Saw vibrations may occur during operation.
► Wear gloves.
► Take regular breaks.
► If signs of circulation problems occur: Seek
medical advice.
■ Sparks may occur if the rotating chain makes
contact with a hard object. Sparks may cause
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