Intake air preheating kit (optional extra)
The intake air preheating kit is recommended in extreme
wintery operating conditions (temperatures below 10'C/
+14 T and in powder
or
drifting snow). Once it is fitted, the
kit causes heated air to be drawn in from around the cylin-
der instead of cold outside air. This prevents air filter
and
carburetor icing. Furthermore, the cover plate blanks off
the
lower
slots
in
the
air
filter housing
to
help
prevent snow
being sucked into the machine.
Detail assembly
instructions
are
supplied with each intake
air preheating kit.
Important:
The
carburetor
preheating flap (see "Carbu-
retor
preheating")
must
be
open when the intake air pre-
heating kit is fitted.
Note: If the saw is very cold (frost or ice on machine),
start
the engine and keep it
at a
high idle speed until it
reaches normal operating temperature and idles smoothly.
Owing
to
the modified air flow when the kit is fitted, the air
filter may tend to load up with dust at a faster rate. If this is
the case, clean the air
filter more frequently.
In the
event of
engine running problems, first check that
conditions specified for use of the intake air preheating kit
still apply (see assembly instructions for intake air pre-
heating kit).
Top: Special carburetor box cover fitted
Bottom: Cover plate in position
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37
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