Engine Running Behavior; Storing The Machine; Sharpening Metal Cutting Blades - Stihl FS 55 Instruction Manual

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– Dirty air filter.
– Unfavorable running conditions.
WARNING
Arcing may occur if the adapter nut (1) is loose
or missing. Working in an easily combustible or
explosive atmosphere may cause a fire or an
explosion. This can result result in serious inju‐
ries or damage to property.
► Use resistor type spark plugs with a properly
tightened adapter nut.
18.3 Installing the spark plug
► Screw home the spark plug, fit the boot and
press it down firmly.

19 Engine Running Behavior

If engine running behavior is unsatisfactory even
though the air filter is clean and the carburetor is
properly adjusted, the cause may be the muffler.
Have the muffler checked for contamination (car‐
bonization) by your servicing dealer.
STIHL recommends that you have servicing and
repair work carried out exclusively by an author‐
ized STIHL servicing dealer.

20 Storing the Machine

For periods of about 3 months or longer
► Drain and clean the fuel tank in a well ventila‐
ted area.
► Dispose of fuel properly in accordance with
local environmental requirements.
► Run the engine until the carburetor is dry – this
helps prevent the carburetor diaphragms stick‐
ing together.
► Remove, clean and inspect the cutting attach‐
ment. Coat metal cutting attachments with cor‐
rosion inhibitor.
► Thoroughly clean the machine – pay special
attention to the cylinder fins and air filter.
30
► Store the machine in a dry and secure location
– out of the reach of children and other unau‐
thorized persons.
21 Sharpening Metal Cutting
1
► Use a sharpening file (special accessory) to
sharpen dull cutting attachments. In case of
more serious wear or nicks: Resharpen with a
grinder or have the work done by a dealer –
STIHL recommends a STIHL servicing dealer.
► Sharpen frequently, take away as little metal
as possible – two or three strokes of the file
are usually enough.
1
2
► Resharpen the teeth (1) uniformly – do not
alter the contour of the parent blade (2) in any
way.
See cutting attachment packaging for additional
sharpening instructions. Keep the packaging for
future reference.
21.1
► After resharpening about 5 times, check the
cutting attachment for out-of-balance on a
STIHL balancer (special accessory) or have it
checked by a dealer and re-balanced as nec‐
essary – STIHL recommends a STIHL servic‐
ing dealer.
19 Engine Running Behavior
Blades
1
2
Balancing
1
2
0458-233-8321-G