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32 – English
MAINTENANCE
Cooling system
To obtain the lowest possible running temperature the saw is
equipped with a cooling system.
The cooling system
consists of:
1. Air intake on the starter
unit.
2. Air guide plate.
3. Fan blades on the
flywheel.
4. Cooling fins on the
cylinder.
5. Cylinder cowling
(supplies cold air over
the cylinder).
Clean the cooling system with a brush once a week, more often
in demanding conditions. A dirty or blocked cooling system
results in the saw overheating which causes damage to
piston and cylinder.
Winter use
During winter time, powder snow and cold weather can cause
running problems, such as:
• Too low engine temperature.
• Icing on the air filter and carburetor.
Therefore some special measures are required:
• Partly reduce the air inlet of the starter and by doing that
increase the engine temperature.
• Preheat the intake air to the carburetor by removing the
special plug between the cylinder and the carburetor space.
The cylinder cover is made so it can be changed for running in
cold weather. There is a possibility to make a hole in which,
during the warmer part of the year, should be sealed using a
plug.
Temperature 0
o
C (32
o
F) or colder
Move the cover from position
A to position B so that
preheated air can pass from
the cylinder to the carburetor
space and prevent formation
of ice in the air filter. NOTE!
When the cover is placed in
the air nozzle it is important
that the air nozzle seals
hermetically to the cylinder
cover.
When the cover is mounted in
position A, it must be turned
with the cut towards the air
filter. To make a proper
centrifugal cleaning possible,
the air nozzle must seal
hermetically to the crankcase
and cylinder cover.
Centrifugal cleaning ”Air Injection”
Centrifugal cleaning means
the following:
All air to the carburetor is
carried through the starter.
Dirt and dust is centrifuged
away by the cooling fan.
IMPORTANT! In order to keep
the function of the centrifugal
cleaning, a continous
maintenance and care must
be made.
• Clean the air intake to the
starter, the fan wings of the
flywheel, the space around
the flywheel, inlet pipe and
carburetor space.
1
2
5
4
3
Temperature -5
o
C (23
o
F) or colder
For running the saw in cold
weather or powder snow, a
special cover is available,
which is mounted on the
starter housing. This reduces
the air flow and prevents large
amounts of snow from being
sucked in.
IMPORTANT! If a special winter kit is assembled or measures
are taken to increase the engine temperature, a readjustment to
normal setting has to be done when the saw is used under
normal conditions. Otherwise, there is a risk of overheating,
which can cause severe engine damage.
IMPORTANT! Any maintenance other than that described in
this manual must be carried out by your servicing dealer.