Winter Operation - Stihl MS 171 Instruction Manual

felling cut. The chain brake will operate
only if it has been properly maintained
and the hand guard has not been
modified in any way.
Check operation of chain brake
Before starting work: Run engine at idle
speed, engage the chain brake (push
hand guard toward bar nose).
Accelerate up to full throttle for no more
than 3 seconds – the chain must not
rotate. The hand guard must be free
from dirt and move freely.
Chain brake maintenance
The chain brake is subject to normal
wear. It is necessary to have it serviced
and maintained regularly by trained
personnel, such as your STIHL servicing
dealer, at the following intervals:
Full-time usage:
Part-time usage:
Occasional usage:
MS 171, MS 181, MS 181 C, MS 211, MS 211 C

Winter Operation

Winter shutter (MS 211 only)
At temperatures below +50°F (+10°C):
N Remove the shroud – see "Shroud".
every 3
months
every 6
months
every 12
months
N Use the combination wrench to turn
the shutter, next to the spark plug,
45° counterclockwise.
1 Winter operation
2 Summer operation
N Install the shroud – see "Shroud".
Heated air is now drawn in from around
the cylinder to warm the carburetor – this
helps prevent carburetor icing.
At temperatures above
+68°F (+20°C), return the shutter
to the summer position. This is
necessary to avoid engine running
problems and overheating.
Fitting the cover plate
(Special accessory, not for Easy2Start
models)
2
1
N Place the cover plate (1) in position
and secure it with the screws (2).
N
If your saw is very cold, start the
engine and run it until it reaches
normal operating temperature.
MS 211 only: When the cover plate is
2
fitted, the winter shutter may be in either
the winter or summer positions. Move it
to the winter position when temperatures
drop below +50°F (+10°C).
English
2
1
33