WARNING
Note the arrows indicating the direction of rota‐
tion on diamond abrasive wheels.
► Fit the front thrust washer (3). The catches of
the front thrust washer (3) must engage in the
shaft grooves
► Screw in the hexagon bolt and tighten it with
the combination wrench – if using a torque
wrench, refer to the "Specifications" for the
tightening torque
► Draw the locking pin out of the V-belt guard
WARNING
Never use two abrasive wheels at the same time.
The uneven wear creates a risk of breaking and
an injury hazard!
11 Fuel
The engine requires a mixture of gasoline and
engine oil.
WARNING
Avoid direct skin contact with and breathing in of
gasoline fumes.
11.1
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 is blended with STIHL HP Ultra
two-stroke engine oil for maximum engine life.
MotoMix is not available in all markets.
11.2
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 poor quality gasoline or
engine oil is used.
11.2.1
Gasoline
Use only high-quality gasoline with an octane rat‐
ing of at least 90 ROC – leaded or unleaded.
Engines with M-Tronic or STIHL Injection deliver
full engine performance using gasoline with an
alcohol component of up to 25% (E25).
11.2.2
Engine oil
If you mix your own fuel, only a STIHL two-stroke
engine oil or another high-performance engine
oil in the classes JASO FB, JASO FC, JASO FD,
ISO-L-EGB, ISO-L-EGC or ISO-L-EGD must be
used.
STIHL specifies the STIHL HP Ultra two-stroke
engine oil or an equivalent high-performance
engine oil to be able to guarantee the emissions
limit values are met throughout the machine life.
11.2.3
Mixing ratio
with STIHL two-cycle engine oil 1:50; 1:50 =
1 part oil + 50 parts gasoline
11.2.4
Examples
Quantity of gaso‐
line
STIHL two-stroke oil
1:50
Liters
Liters
(ml)
1
0.02
(20)
5
0.10
(100)
10
0.20
(200)
15
0.30
(300)
20
0.40
(400)
25
0.50
(500)
► Pour oil into an approved safety fuel canister
first, then add gasoline and mix thoroughly
11.3
Storing fuel mixture
Store in approved safety fuel canisters only in a
dry, cool and secure place protected against light
and sunlight.
Fuel mixture ages – mix only as much as needed
for a few weeks. Do not store fuel mixture for lon‐
ger than 30 days. The fuel mixture can become
unusable faster if exposed to light, sunlight or
low or high temperatures.
STIHL MotoMix however can be stored without
trouble for up to 2 years.
► Shake the canister containing the fuel mixture
thoroughly before refueling
WARNING
Pressure can build up inside the canister – open
carefully.
► The fuel tank and the canister in which fuel
mixture is stored should be cleaned thoroughly
from time to time
11 Fuel
English
0458-753-8321-C
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