Stihl MS 880 R MAGNUM Product Instruction Manual - Page 31

Winter Operation

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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 Winter Operation English At temperatures below 14 °F (-10 °C) (intake air pre-heating) 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: every 3 months every 6 months every 12 months At temperatures below +50 °F (10 °C): 1 2 Pre-heat carburetor N Remove the carburetor box cover N in the carburetor box cover, move the slide from summer position (1) to winter position (2) Heated air is now drawn in from around the cylinder and mixed with cold air - this helps prevent carburetor icing. Above +70 °F (20 °C), always return the slide to the position for "summer operation" again! Risk of engine malfunction - overheating! Machines with HD filter N Replace the HD filter with a standard filter N Replace the carburetor box cover and tighten the knob 171BA022 KN 171BA002 KN Under extreme winter conditions (temperatures below 14 °F (-10 °C), powdered or drifting snow), it is recommended to break out the insert in the cover along the perforated outline using a suitable tool. This causes only warm air from the vicinity of the cylinder to be taken in - prevents icing of air filter and carburetor. N if the chain saw is extremely cold (frost formation) - after starting, bring the engine up to operating temperature at increased idle speed (disengage chain brake!) When used with pre-heating of intake air, heavier fouling of the air filter may occur - shorten cleaning intervals. MS 880 29

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MS 880
English
29
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:
At temperatures below +50 °F (10 °C):
Pre-heat carburetor
N
Remove the carburetor box cover
N
in the carburetor box cover, move
the slide from summer position (1)
to winter position (2)
Heated air is now drawn in from around
the cylinder and mixed with cold air –
this helps prevent carburetor icing.
Machines with HD filter
N
Replace the HD filter with a
standard filter
N
Replace the carburetor box cover
and tighten the knob
At temperatures below 14 °F (-10 °C)
(intake air pre-heating)
Under extreme winter conditions
(temperatures below 14 °F (-10 °C),
powdered or drifting snow), it is
recommended to break out the insert in
the cover along the perforated outline
using a suitable tool.
This causes only warm air from the
vicinity of the cylinder to be taken in –
prevents icing of air filter and carburetor.
N
if the chain saw is extremely cold
(frost formation) – after starting,
bring the engine up to operating
temperature at increased idle speed
(disengage chain brake!)
When used with pre-heating of intake
air, heavier fouling of the air filter may
occur – shorten cleaning intervals.
Full-time usage:
every 3
months
Part-time usage:
every 6
months
Occasional usage:
every 12
months
Winter Operation
Above +70 °F (20 °C), always
return the slide to the position for
"summer operation" again! Risk of
engine malfunction – overheating!
1
171BA022 KN
2
171BA002 KN