FUEL HANDLING
18 – English
Fuel
Note! The machine is equipped with a two-stroke engine
and must always been run using a mixture of gasoline and
two-stroke engine 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. Engines
equipped with catalytic converters must be run on
unleaded fuel mixtures.
• This engine is certified to operate on 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.
Environment fuel
JONSERED recommends the use of alkylate fuel or
environment fuel for four-stroke engines blended with two-
stroke oil as set out below. Note that carburetor
adjustment may be necessary when changing the type of
fuel (see the instructions under the heading Carburetor).
Running-in
Avoid running at a too high speed for extended periods
during the first 10 hours.
Two-stroke oil
• For the best results and performance use JONSERED
two-stroke oil, which is specially formulated for our
two-stroke engines.
• JONSERED provides two stroke oils adapted for
different application areas and climates. Please
contact your dealer for information about the best
options for your product and area of application.
• Never use two-stroke oil intended for water-cooled
outboard engines, sometimes referred to as outboard
oil.
• Never use oil intended for four-stroke engines.
Mixing ratio
1:50 (2%) for all engines.
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
• The chain lubrication system is automatic and 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.
!
WARNING! Always ensure there is
adequate ventilation when handling fuel.
Gasoline, litre Two-stroke oil, litre
2% (1:50)
5 0,10
10 0,43/0,20
15 0,30
20 0,80/0,40
US gallon US fl. oz.
2% (1:50)
1 2 1/2
2 1/2 6 1/2
5 12 7/8
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