Fuel - Stihl FS 55 Notice D'emploi

English
Fitting metal cutting attachments
1 2
For the grass cutting blades 230-2 (1),
230-4 (2) and 230-8 (3) the attached
parts skirt and blade are not
necessary are not necessary on the
mowing tool deflector – see "Mounting
the deflector".
For metal cutting attachments,
use a special version of the thrust
plate (5, next fig.) – to this end, if
necessary, have the machine
checked by a servicing dealer.
If the machine is supplied already
equipped with a metal cutting
attachment, then the correct thrust
plate (5, next fig.) is already mounted.
N Lay down the trimmer with the
mount for the cutting attachment
facing upward
With the grass cutting blades (1) and (2),
the cutting edges may face in either
direction.
With grass cutting blade (3), the cutting
edges must face clockwise.
Observe the arrow for the
direction of rotation on the inside
of the mowing tool deflector.
18
3
N Position the blade (4) on the thrust
plate (5).
The collar (arrow) must engage
the hole in the blade.
N Push the thrust plate (6) and rider
plate (7) onto the shaft (8)
N Block the shaft and screw the
nut (9) counterclockwise onto the
shaft and tighten it
A nut that moves too easily should
be replaced.
Removing the metal cutting
attachment
N Block the shaft
N Unscrew the nut clockwise
N Remove parts from the shaft – do
not remove the thrust plate (5) in
doing so

Fuel

This engine is certified to operate on
unleaded gasoline and with the mix ratio
50:1.
9
Your engine requires a mixture of high-
quality premium gasoline and high-
quality two-stroke air-cooled engine oil.
7
Use premium branded unleaded
6
gasoline with a minimum octane rating
4
of 89 RON.
8
Note: Models equipped with a catalytic
5
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!
Fuels with different percentages of
ethanol are being offered. Ethanol can
affect the running behaviour of the
engine and increase the risk of lean
seizure.
FS 55, FS 55 C, FS 55 R, FS 55 RC