Fuel; Mixing Fuel; Engine Oil - Stihl FS 300 Manual De Instrucciones

8 Fuel

2
b
a
► Position cutting attachment (1)
WARNING
Collar (a) must engage the hole (b) in the cutting
attachment!
7.13.3 Securing the cutting attachment
► Fit the thrust washer (2) – curvature faces
upward
► Fit rider plate (3) for sawing applications
► Block the shaft
► Screw nut (4) counterclockwise onto shaft and
tighten.
WARNING
Nuts that move too easily must be replaced.
NOTICE
Remove the tool used to block the shaft.
7.13.4 Removing the cutting attachment
► Block the shaft
► Unscrew the nut clockwise
► Remove cutting attachment and its mounting
hardware from the gearbox
8 Fuel
The engine requires a mixture of gasoline and

engine oil.

0458-579-8721-B
4
3
1
WARNING
Avoid direct skin contact with fuel and breathing
in of gasoline fumes.
8.1 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.
8.2

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.
8.2.1 Gasoline
Use only high-quality gasoline with an octane rat‐
ing of at least 90 ROC – leaded or unleaded.
Gasoline with an alcohol component exceeding
10% can cause impaired engine performance in
engines with manually adjustable carburetors
and thus should not be used in these engines.
Engines with M-Tronic deliver full engine per‐
formance using gasoline with an alcohol compo‐
nent of up to 27% (E27).
8.2.2 Engine oil
If you mix the fuel yourself, use only STIHL two-
stroke engine oil or another high-performance
engine oil classified as JASO FB, JASO FC,
JASO FD, ISO-L-EGB, ISO-L-EGC or ISO-L-
EGD.
STIHL specifies STIHL HP Ultra two-stroke
engine oil or an equivalent high-performance
engine oil in order to maintain emission limits
over the machine's service life.
8.2.3 Mixing ratio
with STIHL two-stroke engine oil 1:50; 1:50 =
1 part oil + 50 parts gasoline
English
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