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McCulloch CS 380 Manual

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FUEL HANDLING
English – 15
1153988-26 Rev.3 2012-03-09
Fuel
Note! The machine is equipped with a two-stroke engine
and must always be run using a mixture of petrol and two-
stroke oil. It is important to accurately measure the
amount of oil to be mixed to ensure that the correct
mixture is obtained. When mixing small amounts of fuel,
even small inaccuracies can drastically affect the ratio of
the mixture.
Petrol
• Use good quality unleaded or leaded petrol.
• The lowest recommended octane grade is 90 (RON).
If y
ou run the engine on a lower octane grade than 90
so-called knocking can occur. This gives rise to a high
engine temperature and increased bearing load,
which can result in serious engine damage.
• When working with continuous high revs (e.g. limbing)
a higher octane is recommended.
Running-in
Avoid running at a too high speed for extended periods
during the first 10 hours.
Two-stroke oil
• For best results and performance use Universal,
Universal powered by McCULLOCH two-stroke
engine oil, which is specially formulated for our air-
cooled two-stroke engines.
• Never use two-stroke oil intended for water-cooled
engines
, sometimes referred to as outboard oil (rated
TCW).
• Never use oil intended for four-stroke engines.
• A poor oil quality and/or too high oil/fuel ratio may
jeopardise function and decrease the life time of
catalytic converters.
Mixing ratio
1:50 (2%) with Universal, Universal powered by
McCULLOCH two-stroke oil.
1:33 (3%) with oils class JASO FB or ISO EGB formulated
for air-cooled, two-stroke engines.
Mixing
• Always mix the petrol and oil in a clean container
intended for fuel.
• Always start by filling half the amount of the petrol to
be used. Then add the entire amount of oil. Mix
(shake) the fuel mixture. Add the remaining amount of
petrol.
• Mix (shake) the fuel mixture thoroughly before filling
the machine’
s fuel tank.
• Do not mix more than one month’s supply of fuel at a
time.
• If the machine is not used for some time the fuel tank
should be emptied and cleaned.
Chain oil
• We recommend the use of special oil (chain oil) with
good adhesion characteristics.
• Never use waste oil. This results in damage to the oil
pump, the bar and the chain.
• It is important to use oil of the right grade (suitable
viscosity range) to suit the air temperature.
• In temperatures below 0°C (32°F) some oils become
too viscous. This can overload the oil pump and result
in damage to the oil pump components.
• Contact your service agent when choosing chain oil.
Fueling
Clean the area around the fuel cap. Clean the fuel and
chain oil tanks regularly. The fuel filter must be replaced
at least once a year. Contamination in the tanks causes
malfunction. Make sure the fuel is well mixed by shaking
the container before refuelling. The capacities of the chain
oil tank and fuel tank are carefully matched. You should
therefore always fill the chain oil tank and fuel tank at the
same time.
!
WARNING! Always ensure there is
adequate ventilation when handling fuel.
Petrol, litre Two-stroke oil, litre
2% (1:50) 3% (1:33)
5 0,10 0,15
10 0,20 0,30
15 0,30 0,45
20 0,40 0,60
!
WARNING! Taking the following
precautions, will lessen the risk of fire:
Do not smoke and do not place any hot
objects in the vicinity of fuel.
Always stop the engine and let it cool for
a few minutes before refuelling.
When refuelling, open the fuel cap slowly
so that any excess pressure is released
gently.
Tighten the fuel cap carefully after
refuelling.
Always move the machine away from the
refuelling area and source before
starting.
… 15 …


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