and be ejected at high speed. They may
cause serious injury to persons.
► Work only with an undamaged mowing head.
► Never use metal objects in place of the nylon
mowing lines.
► Observe and remain inside the wear limits.
► If you have any doubts, be sure to consult a
STIHL dealer.
4.6.4 Metal cutting attachment
The metal cutting attachment is in a safe condi‐
tion if the following points are observed:
–
Metal cutting attachment and mounting hard‐
ware are undamaged.
–
Metal cutting attachment is not warped.
–
Metal cutting attachment is properly mounted.
–
Metal cutting attachment is correctly sharp‐
ened.
–
Cutting edges of the metal cutting attachment
have no burrs.
–
The wear limits are not exceeded.
–
If a metal cutting attachment not manufactured
by STIHL is used, it must not be heavier,
thicker, of a different shape, of a lower quality,
or larger in diameter than the largest metal
cutting attachment approved by STIHL.
WARNING
■ If it is not in an safe condition, parts of the
metal cutting attachment may come off and be
thrown at high speed. They may cause serious
injury to persons.
►
Never work with a damaged metal cutting
attachment or damaged mounting hardware.
► Sharpen the metal cutting attachment cor‐
rectly.
► Deburr the cutting edges with a file.
► Have the metal cutting attachment balanced
by a STIHL servicing dealer.
► Observe and remain inside the wear limits.
► Use a metal cutting attachment specified in
these instructions for use.
► If you have any doubts, be sure to consult a
STIHL dealer.
4.7 Fuel Mixture and Refueling
WARNING
■
This trimmer requires a fuel mixture of gaso‐
line and two-stroke engine oil. Fuel mixture
and gasoline are extremely flammable. If fuel
mixture or gasoline make contact with open
fire or hot objects, they can cause a fire or
explosion. This can result in serious or fatal
injuries and damage to property.
►
Protect fuel mixture and gasoline from heat
and fire.
► Do not spill fuel mixture and gasoline.
► If fuel has been spilled: Wipe up the fuel with
a cloth and do not attempt to start the engine
until all parts of the trimmer and the area
around it are dry.
►
Do not smoke.
► Never refuel near a fire.
► Shut off the engine and allow it to cool down
before refueling.
► Start the engine at least 3 meters from the
fueling spot, outdoors only.
■ Inhaling fuel fumes and gasoline fumes can
have toxic effects.
► Avoid inhaling fuel fumes or gasoline fumes.
► Refuel in a well-ventilated location.
■ The trimmer becomes hot during operation.
The fuel expands and excess pressure can
build up in the tank. Fuel can escape as a
spray when the fuel tank cap is opened. The
escaping fuel can ignite. This can result in
serious injuries.
►
Allow the trimmer to cool down first and then
open the tank cap carefully.
■ Clothing that has been in contact with fuel or
gasoline is more easily flammable. This can
result in serious or fatal injuries and damage
to property.
►
If your clothing comes into contact with fuel
or gasoline: Change your clothing.
■ Fuel mix, gasoline and two-stroke engine oil
can harm the environment.
► Do not spill fuel, gasoline or two-stroke
engine oil.
► Dispose of fuel mix, gasoline and two-stroke
engine oil in accordance with local regula‐
tions and environmental requirements.
■
Fuel, gasoline or two-stroke engine oil can
cause irritation if they come into direct contact
with the skin or eyes.
►
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 trimmer’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.
English 4 Safety Precautions
8 0458-856-0121-A. VA0.B21.
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