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Chain brake maintenance
The chain brake is subject to normal
wear and tear. It must therefore be
checked and serviced regularly by
trained personnel (e.g. a STIHL dealer)
at the following intervals:
Full-time usage:
every 3 months
Part-time usage:
every 6 months
Occasional usage:
every 12 months
32
Winter Operation
Preheating the carburetor
Remove the shroud – see "Shroud".
N
At temperatures below +50°F (+10°C):
Use the combination wrench or a
N
screwdriver to ease the shutter out
of the summer position s.
1
Refit the shutter the other way round
N
in the winter position – the arrow
points to the symbol r – the shutter
must snap into position.
The arrowhead (1) is visible in the winter
position.
Install the shroud – see "Shroud".
N
Heated air is now drawn in from around
the cylinder to warm the carburetor – this
helps prevent carburetor icing.
At temperatures above +70°F (+20°C):
Always return the shutter to the
N
summer position (s ) to avoid
engine running problems and
overheating.
At temperatures below 14°F ( - 10°C)
It is advisable to fit the "cover plate" kit
(special accessory) if you use your saw
in extremely cold conditions
(temperatures below 14°F ( - 10°C), in
powder or drifting snow).
If idling behavior is erratic or
acceleration is poor:
Turn the low speed screw (L) 1/4 of
N
a turn counterclockwise.
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed
screw (L) – see "Adjusting the
Carburetor".
If your saw is very cold (frost or ice
N
on machine), start the engine and
keep it at a high idle speed (with
chain brake disengaged) until it
reaches normal operating
temperature.
Cover plate
The cover plate (special accessory)
helps prevent snow being sucked into
the machine.
When the cover plate is fitted, the
shutter must be in the winter position.
MS 261 C-Q
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