Instruction Manual

Securing the cutting attachment
► Fit the thrust washer (6) – convex side must
face up.
► Fit the rider plate (5)
► Push the offset screwdriver (10) into the hole
in the gear as far as it will go; press lightly
► Rotate shaft (8), nut (4) or cutting tool until the
offset screwdriver engages and the shaft is
blocked
► Use the combination wrench to screw the
mounting nut (4) on to the output shaft coun‐
terclockwise and firmly tighten it.
WARNING
Nuts that move too easily must be replaced.
NOTICE
Remove the tool that was used to block the
shaft.
8.6 Removing the metal cutting
attachment
WARNING
Put on protective gloves – risk of injury from
sharp cutting edges
► Block shaft with offset screwdriver
► Unscrew the mounting nut clockwise
► Remove cutting attachment and its mounting
hardware from the gearbox – but do not
remove the thrust plate (9).
9 Fuel
Your engine requires a mixture of gasoline and
engine oil.
WARNING
For health reasons, avoid direct skin contact with
gasoline and avoid inhaling gasoline vapor.
9.1 STIHL MotoMix
STIHL recommends the use of STIHL MotoMix.
This ready-to-use fuel mix contains no benzol or
lead, has a high octane rating and ensures that
you always use the right mix ratio.
STIHL MotoMix uses STIHL HP Ultra two-stroke
engine oil for an extra long engine life.
MotoMix is not available in all markets.
9.2 Mixing Fuel
NOTICE
Unsuitable fuels or lubricants or mix ratios other
than those specified may result in serious dam‐
age to the engine. Poor quality gasoline or
engine oil may damage the engine, sealing rings,
hoses and the fuel tank.
9.2.1 Gasoline
Use only high-quality brand-name gasoline with
a minimum octane rating of 90 – leaded or unlea‐
ded.
Gasoline with an ethanol content of more than
10% can cause running problems in engines with
a manually adjustable carburetor and should not
be used in such engines.
Engines equipped with M-Tronic deliver full
power when run on gasoline with an ethanol con‐
tent of up to 25% (E25).
9.2.2 Engine Oil
If you mix the fuel yourself, use only STIHL two-
stroke engine oil or another high-performance
engine oil in accordance with 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.
9.2.3 Mix Ratio
STIHL 50:1 two-stroke engine oil: 50 parts gaso‐
line to 1 part oil
9.2.4 Examples
Gasoline STIHL engine oil 50:1
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)
► Use a canister approved for storing fuel. Pour
oil into canister first, then add gasoline and
mix thoroughly.
9.3 Storing Fuel
Store fuel only in approved safety-type fuel can‐
isters in a dry, cool and safe location protected
from light and the sun.
English 9 Fuel
18 0458-233-0121-H