Winter Operation - Stihl MS 880 Manual De Instrucciones

English
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:
36

Winter Operation

At temperatures below +50 °F (10 °C):
Pre-heat carburetor
Remove the carburetor box cover
N
in the carburetor box cover, move
N
every 3
the slide from summer position (1)
months
to winter position (2)
every 6
Heated air is now drawn in from around
months
the cylinder and mixed with cold air – this
every 12
helps prevent carburetor icing.
months
NOTICE
Above +70 °F (20 °C), always return the
slide to the position for "summer
operation" again! Risk of engine
malfunction – overheating!
Air filter system
Retrofit new air filter if necessary –
N
see "Air filter system"
1
2
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.
if the chain saw is extremely cold
N
(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