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Alpina AT2 72 A Manual

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3.5 ENVIRONMENTAL CONDITIONS
The operation of a four-stroke 
endothermic engine is aected by:
a) Temperature:
– When operating at low temperatures 
cold starts may be dicult.
– When operating at very high temperatures 
warm starts may be dicult due to 
evaporation of the fuel in the oat chamber 
of the carburettor or in the pump.
– In any case the right kind of oil 
must be used, according to the 
operating temperatures.
b) Altitude:
– The higher the altitude above sea level,
the lower the max power developed 
by an endothermic engine.
– When there is a considerable
increase in altitude, the load on the
machine should be reduced and 
particularly heavy work avoided.
3.6 FUEL
A good quality fuel is the major issue for the engine 
reliability of operation.
Fuel must meet these requirements:
a)   Use clean, fresh unleaded gasoline, with a min-
imum of 90 octane.
b)   Do not use fuel formulated with ethanol greater 
than 10%.
c) Do not add oil.
d)   To protect the fuel system from gum formation, 
mix a fuel stabilizer into the fuel.
Use of unapproved fuels will cause damage to en-
gine components, which will not be covered under 
warranty.
NOTE Only use the fuel named in the technical
data table. Do not use other types of fuel. It is
possible to use ecological fuels, such as alkylate
petrol. The composition of this petrol has less of
an impact on people and animals. No negative
eects have been reported in connection to their
use. Nonetheless, there are types of alkylate
petrol on the market for which it is not possible
to provide specic indications on their use.
3.7 OIL
Use always high quality oils, choosing 
their viscosity grade according to 
the operating temperature.
• Only use detergent oil with a quality 
of no less than SF-SG.
• Choose the SAE viscosity based 
on the technical data table.
• The use of multigrade oil can lead to greater 
consumption in hot weather, accordingly it is 
necessary to check the level more frequently.
• Do not mix oils of dierent brands 
and characteristics.
• SAE 30 oil, if used below +5°C, could 
result in possible engine damage 
due to inadequate lubrication.
3.8 AIR FILTER
The air lter must always be in perfect 
working order, to prevent debris and dust 
from getting sucked into the engine, reducing 
the eciency and life of the machine.
• Always keep the ltering element free of 
debris and in perfect working order (par. 6.5).
• If necessary, replace the ltering 
element with an original spare part. 
Incompatible ltering elements can impair 
the eciency and life of the engine.
• Never start the engine without mounting 
the ltering element properly.
3.9 SPARK PLUG
Not all the spark plugs for endothermic 
engines are the same.
• Use only spark plugs of the recommended 
type, with the right heat range.
• Check the length of the thread, because - if too 
long - it will damage the engine beyond repair.
• Make sure that the electrodes are clean 
and that their gap is correct (par. 6.6).
4. CONTROLS
4.1 ACCELERATOR CONTROL
This controls engine rpm.
The throttle trigger (generally a lever), tted to the 
machine, is connected to the engine by a cable.
Consult the machine's Instructions Manual to 
identify the throttle trigger and its positions, 
usually marked by symbols, corresponding to:
• FAST = corresponds to maximum 
revs; to be used when working.
• SLOW = corresponds to minimum revs.
• CHOKE = to be used for cold
starts (when applicable)
… 30 …


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