Fuel - Stihl FS 56 Instruction Manual

9 Fuel

WARNING
Direction of rotation is indicated by an arrow on
the inside of the deflector.
► Place the cutting attachment (4) on the thrust
plate (5).
WARNING
Collar (see arrow) must engage the cutting
attachment's mounting hole.
Securing the cutting attachment
► Fit the thrust washer (6) – convex side must
face up.
► Fit the rider plate (7).
► Block the shaft (8).
► Screw the mounting nut (9) on to the shaft
counterclockwise and tighten it down firmly.
0458-547-0121-F
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6
4
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5
WARNING
If the mounting nut has become too loose, fit a
new one.
NOTICE
Remove the tool used to block the shaft.
8.9 Removing the Metal Cutting
Attachment
WARNING
Wear protective gloves to reduce the risk of
direct contact with the sharp cutting edges.
► Block the shaft.
► Unscrew the mounting nut clockwise.
► Remove cutting attachment and its mounting
hardware from the gearbox – but do not
remove the thrust plate (5).
9 Fuel
The engine requires a mixture of gasoline and
engine oil.
WARNING
Avoid direct skin contact with fuel and breathing
in of gasoline fumes.
9.1 STIHL MotoMix
STIHL recommends using STIHL MotoMix. This
pre-blended fuel is free of benzene and lead, is
distinguished by a high octane rating, and
always provides the proper mixing ratio.
STIHL MotoMix uses STIHL HP Ultra two-stroke
engine oil for optimum engine life.
MotoMix is not available in all markets.
9.2 Mixing fuel
NOTICE
Unsuitable fuels or a mixing ratio that deviates
from the specification can lead to severe engine
damage. The engine, seals, fuel lines and fuel
tank may be damaged if low-quality gasoline or
engine oil is used.
9.2.1 Gasoline
Use only high-quality gasoline with an octane rat‐
ing of at least 90 ROC – leaded or unleaded.
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