McCulloch CS 340 Manual De Instrucciones página 16

FUEL HANDLING
Fuel
Note! The machine is equipped with a two-stroke engine
and must always be run using a mixture of gasoline 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.
Gasoline
Use good quality unleaded gasoline.
The lowest recommended octane grade is 87
((RON+MON)/2). If you run the engine on a lower
octane grade than 87 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 synthetic two-
stroke engine oil, which is specially formulated for air-
cooled two-stroke engines.
Never use two-stroke oil intended for water-cooled
engines, sometimes referred to as outboard oil (rated
TOW).
Never use oil intended for four-stroke engines.
Mixing ratio
50:1 (2%) for all engines.
Gasoline, litre Two-stroke oil, litre
2% (50:1)
5 0,10
10 0,20
15 0,30
20 0,40
US gallon US fl. oz.
1 2 1/2
2 1/2 6 1/2
5 12 7/8
Mixing
Always mix the gasoline and oil in a clean container
intended for fuel.
Always start by filling half the amount of the gasoline
to be used.Then add the entire amount of oil. Mix
(shake) the fuel mixture.Add
the remaining amount of
gasoline.
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 32°F (0°C) 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
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.
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.
16 - English 1154657-49 Rev.1 2012-03-15