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FS 45, FS 46
English
20
Adjusting Nylon Line
STIHL AutoCut
N Hold the rotating mowing head
above the ground – tap it on the
ground once – about 1.2 in. (3 cm)
fresh line is advanced.
N The blade (1) on the deflector (2)
trims surplus line to the correct
length – avoid tapping the mowing
head more than once at a time.
Line feed operates only if both lines still
have a minimum length of 1 in. (2.5 cm).
If the mowing line is shorter than 1 in.
(2.5 cm):
To reduce the risk of injury, always shut
off the engine before adjusting the
mowing line by hand.
N Turn the trimmer on its back.
N Press down the cap on the spool as
far as stop.
N Pull the ends of the lines out of the
spool.
If the spool is empty, see "Replacing
Nylon Line".
All other mowing heads
Refer to the instructions supplied with
the mowing head.
To reduce the risk of injury, always shut
off the engine before adjusting the
mowing line by hand.
Replacing Nylon Line / Polymer Blades
STIHL AutoCut
See chapter on "Replacing Nylon Line".
STIHL PolyCut, FixCut
Refer to the instructions supplied with
the mowing head.
This engine is certified to operate on
unleaded gasoline and the STIHL two-
stroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of high-
quality gasoline and two-stroke air
cooled engine oil.
Use mid-grade unleaded gasoline with a
minimum octane rating of 89 (R+M/2)
and no more than 10% ethanol content.
Fuel with a lower octane rating may
increase engine temperatures. This, in
turn, increases the risk of piston seizure
and damage to the engine.
The chemical composition of the fuel is
also important. Some fuel additives not
only detrimentally affect elastomers
(carburetor diaphragms, oil seals, fuel
lines, etc.), but magnesium castings and
catalytic converters as well. This could
cause running problems or even
damage the engine. For this reason
STIHL recommends that you use only
high-quality unleaded gasoline!
Gasoline with an ethanol content of
more than 10% can cause running
problems and major damage in engines
with a manually adjustable carburetor
and should not be used in such engines.
The ethanol content in gasoline affects
engine running speed – it may be
necessary to readjust the carburetor if
you use fuels with various ethanol
contents.
1
232BA007 KN
2
Fuel
22


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