Fuel Handling; Fuel - Husqvarna VentMaster 570X-Torq Operation Manual

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.
WARNING! Always ensure there is adequate
!
ventilation when handling fuel.
Gasoline
• This engine is certified to operate on unleaded
gasoline.
• Use good quality unleaded gasoline. Engines equipped
with catalytic converters must be run on unleaded fuel
mixtures.
• The lowest recommended octane grade is RON 90. If you
run the engine on a lower octane grade than RON 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.
Environment fuel
HUSQVARNA 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
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 best results and performance use HUSQVARNA two-
stroke oil, which is specially formulated for our two-stroke
engines.
• 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
For all engines: 1:50 (2%)
Gasoline, litre Two-stroke oil, litre
2% (1:50)
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

FUEL HANDLING

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 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.
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