Manual Husqvarna 455 Rancher (page 19 of 44) (English)

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FUEL HANDLING

English – 19

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.

• CAUTION! Engines equipped with catalytic

converters must be run on unleaded fuel

mixtures. Leaded gasoline will destroy the catalytic

converter and it will no longer serve its purpose. The

green fuel cap on saws ﬁtted with catalytic converters

means that only unleaded gasoline can be used.

• The lowest recommended octane grade is 90 (RON).

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.

• When working with continuous high revs (e.g. limbing)

a higher octane is recommended.

Environment fuel

HUSQVARNA recommends the use of alkylate fuel, either

Aspen two-stroke fuel or environmental fuel for four-stroke

engines blended with two-stroke oil as set out below. Note

that carburettor adjustment may be necessary when

changing the type of fuel (see the instructions under the

heading Carburettor).

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 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 HUSQVARNA 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.

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

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Others manual(s) of Husqvarna 455 Rancher

Husqvarna 455 Rancher User Manual - English - 40 pages

Husqvarna 455 Rancher User Manual - German - 84 pages

Husqvarna 455 Rancher User Manual - Dutch - 40 pages

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Husqvarna 455 Rancher Manual

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