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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 im-
portant to accurately measure the amount of
oil to be mixed to ensure that the correct mix-
ture is obtained. When mixing small amounts
of fuel, even small inaccuracies can drastic-
ally affect the ratio of the mixture.
WARNING:
Always ensure there is
adequate ventilation when handling fuel.
PETROL
S Use good quality unleaded or leaded petrol.
S The lowest recommended octane grade is
90 (RON).
S If you 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.
S When working with continuous high revs
(e.g. limbing) a higher octane is recom-
mended.
Running- - in
AvoId running at a too high speed for exten-
ded periods during the first 10 hours.
TWO-STROKE OIL
S For best results and performance use Uni-
versal, Universal powered by McCulloch
two- -stroke engine oil, which is specially
formulated for our air cooled two- -stroke
engines.
S Never use two-stroke oil intended for water-
cooled engines, sometimes referred to as
outboard oil (rated TCW).
S Never use oil intended for four- -stroke en-
gines.
S A poor oil quality and/or too high oil/fuel ra-
tio may jeopardise function and decrease
the lifetme 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.
Petrol, litre
Two- - Stroke Oil, litre
2% (1:50)
5
10
15
20
FUEL HANDLING
3% (1:33)
0,10
0,15
0,20
0,30
0,30
0,45
0,40
0,60
MIXING
S Always mix the petrol and oil in a clean
container intended for fuel.
S 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.
S Mix (shake) the fuel mixture thoroughly be-
fore filling the machine's fuel tank.
S Do not mix more than one month's supply
of fuel at a time.
S If the machine is not used for some time
the fuel tank should be emptied and
cleaned.
CHAIN OIL
S We recommend the use of special oil
(chain oil) with good adhesion character-
istics.
S Never use waste oil. This results in dam-
age to the oil pump, the bar and the chain.
S It is important to use oil of the right grade
(suitable viscosity range) to suit the air
temperature.
S In temperatures below 0°C (32°F) some
oils become too viscous. This can over-
load the oil pump and result in damage to
the oil pump components.
S Contact your service dealer when choos-
ing chain oil.
FUELING
WARNING:
cautions 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 refuel-
ing; when refueling, open the fuel cap slowly
so that any excess pressure is released
gently; tighten the fuel cap carefully after re-
fueling; always move the machine away
from the refueling area and source before
starting.
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 malfunc-
tion. 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:
highly flammable. Take care when handling
fuel and chain oil. Be aware of the risks of
fire, explosion and those associated with in-
halation.
10
Taking the following pre-
Fuel and fuel vapour are
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