Instruction manual
FS 55, FS 55 C, FS 55 R, FS 55 RC
English
14
Using the Grass Cutting Blade
All kinds of grass and weeds can be 
easily cut with the grass cutting blade. 
The power tool is swept in an arc similar 
to a scythe.
The 4-tooth grass cutting blade is 
intended to cut grass and weeds. It has 
4 cutting knives with cutting edges on 
both sides, i.e. front and rear. When the 
cutting edges on one side become dull, 
the blade can be turned over to utilize 
the cutting edges on the other side.
The 8-tooth grass cutting blade is 
recommended for cutting fern or reed.
Both types of grass cutting blade have to 
be resharpened when all cutting edges 
are dull.
MAINTENANCE, REPAIR AND 
STORING
Maintenance, replacement, or repair 
of the emission control devices and 
systems may be performed by any 
nonroad engine repair establishment 
or individual. However, if you make a 
warranty claim for a component 
which has not been serviced or 
maintained properly or if 
nonapproved replacement parts were 
used, STIHL may deny coverage.
Strictly follow the maintenance and 
repair instructions in the appropriate 
sections of your instruction manual.
Wear gloves when handling or 
performing maintenance on blades.
Warning!
To reduce the risk of serious or fatal 
injury from blade breakage, never 
attempt to use this blade to cut woody 
materials.
000BA020 KN
Warning!
Use only identical STIHL replacement 
parts for maintenance and repair. Use of 
non-STIHL parts may cause serious or 
fatal injury.
Warning!
Always stop the engine and make sure 
that the cutting attachment is stopped 
before doing any maintenance or repair 
work or cleaning the power tool. Do not 
attempt any maintenance or repair work 
not described in your instruction man-
ual. Have such work performed by your 
STIHL servicing dealer only.
Warning!
Use the specified spark plug, and make 
sure it and the ignition lead are always 
clean and in good condition. Always 
press the spark plug boot snugly onto 
the spark plug terminal of the proper 
size. (Note: If the terminal has a detach-
able SAE adapter nut, it must be 
securely attached.) A loose connection 
between the spark plug and the ignition 
wire connector in the boot may create 
arcing that could ignite combustible 
fumes and cause a fire.
Warning!
Never test the ignition system with the 
spark plug boot removed from the spark 
plug or with a removed spark plug, since 
uncontained sparking may cause a fire.
Warning!
Do not operate your power tool if the 
muffler is damaged, missing or modi-
fied. An improperly maintained muffler 
will increase the risk of fire and hearing 
loss. If your muffler was equipped with a 
spark-arresting screen to reduce the 
risk of fire, never operate your power 
tool if the screen is missing or damaged. 
Remember that the risk of forest fires is 
greater in hot or dry weather.
Warning!
Never repair damaged cutting attach-
ments by welding, straightening or 
modifying the shape. This may cause 
parts of the cutting attachment to come 
off and result in serious or fatal injuries.










