Fuel - Stihl FS 120 Notice D'emploi

:
Lay your brushcutter on its back
with the cutting tool mounting face
pointing up:
Cutting edges of (1), (3) and (4) may
point in either direction.
Cutting edges of (2), (5) and (6)
must point clockwise.
Direction of rotation is marked by
arrow on inside of cutting head
deflector or limit stop.
FS 120, FS 200, FS 250
:
Place the cutting tool (7) on the
thrust plate (8).
Collar (see arrows) must locate in
cutting tool's mounting hole.
:
Slip thrust washer (9) and rider
plate (10) over the output shaft (11).
:
Block the output shaft.
:
Screw the mounting nut (12) on to
the output shaft counterclockwise
and use the combination wrench
(13) to tighten it down firmly.
If the mounting nut is too loose,
fit a new one.
Removing metal cutting tools
:
Block the output shaft.
:
Unscrew the nut clockwise.
:
Take the parts off the shaft – but do
not remove the thrust plate (8).
English

Fuel

This engine is certified to operate on
unleaded gasoline and with the mix ratio
50:1.
Your two-stroke engine requires a
mixture of high-quality premium
gasoline and high-quality two-stroke air-
cooled engine oil.
Use premium high-quality unleaded
gasoline with a minimum octane rating
of 89 RON.
Note: Models equipped with a catalytic
converter require unleaded gasoline. A
few tankfuls of leaded gasoline can
reduce the efficiency of the catalytic
converter by more than 50%.
Fuel with a lower octane rating may
result in preignition (causing "pinging")
which is accompanied by an increase in
engine temperature. This, in turn,
increases the risk of the 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 as
well. This could cause running problems
or even damage the engine. For this
reason it is essential that you use only
high-quality fuels!
29