Stihl Fs 90 R Manual

FS 90, FS 90 R
English
9 Models with bike handle
Right hand on control handle, left hand 
on left handle.
Models with loop handle
Left hand on loop handle, right hand on 
control handle, even if you are left-
handed.
WARNING
WARNING
Do not overreach. Keep proper footing 
and balance at all times. Special care 
must be taken in slippery conditions (wet 
ground, snow) and in difficult, overgrown 
terrain. Watch for hidden obstacles such 
as tree stumps, roots and ditches to 
avoid stumbling. For better...

FS 90, FS 90 R
English
10 where possible. Use good work 
practices, such as operating the unit so 
that the wind or operating process 
directs any dust raised by the power tool 
away from the operator. Follow the 
recommendations of EPA / OSHA / 
NIOSH and occupational and trade 
associations with respect to dust 
("particulate matter"). When the 
inhalation of dust cannot be 
substantially controlled, i.e., kept at or 
near the ambient (background) level, the 
operator and any bystanders should...

FS 90, FS 90 R
English
11 superficial cracks. Such attachments 
may shatter at high speed and cause 
serious or fatal injury.
WARNING
When using rigid blades, avoid cutting 
close to fences, sides of buildings, tree 
trunks, stones or other such objects that 
could cause the power tool to kick out or 
could cause damage to the blade. 
STIHL recommends use of the nylon line 
heads for such jobs. In addition, be alert 
to an increased possibility of ricochets in 
such situations.
WARNING
If a rotating...

FS 90, FS 90 R
English
12
WARNING
USING THE CUTTING ATTACHMENT
For an illustration of the various cutting 
attachments and instructions on proper 
mounting see the chapter on "Mounting 
the Cutting Attachment" in your 
instruction manual.
WARNING
To reduce the risk of severe or fatal 
injury from blade contact and / or loss of 
control, never attempt to use a metal 
blade on an FS model for which it is not 
authorized.Using the Mowing Heads
Do not use with mowing line longer than 
the intended...

FS 90, FS 90 R
English
13
WARNING
Three rectangular wear limit marks are 
applied to the base (periphery) of the 
PolyCut. To reduce the risk of serious 
injury from breakage of the head or 
blades, the PolyCut must not be used 
when it has worn as far as one of these 
marks. It is important to follow the 
maintenance instructions supplied with 
the head.
STIHL FixCut mowing head
Uses pre-cut lengths of nylon line.
Observe wear indicators.
Do not continue using the mowing head 
if the raised moldings (1)...

FS 90, FS 90 R
English
14 To cut wild growth and scrub, lower the 
rotating brush knife down onto the 
growth to achieve a chopping effect – 
but keep the tool below waist height at 
all times.
WARNING
Exercise extreme caution when using 
this method of cutting. The higher the 
cutting attachment is off the ground, the 
greater the risk of loss of control and of 
cuttings being thrown sideways.
Use the power tool like a scythe to cut 
grass, i.e. sweep it to and fro in an arc.
WARNING
When cutting woody...

FS 90, FS 90 R
English
15 replaced by the special limit stop 
deflector (see chapter on "Mounting the 
Deflector"). This limit stop helps to keep 
the unit positioned against the tree 
during the cutting process. 
Inexperienced users should place the 
left side of the stop against the tree trunk 
before beginning to cut. This will keep 
the trimmer / brushcutter against the tree 
during the cutting operation and will 
reduce the risk of loss of control and 
possible kickout (described above and...

FS 90, FS 90 R
English
16 the spark plug terminal of the proper 
size. (Note: If the terminal has a 
detachable 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...

FS 90, FS 90 R
English
17
Approved Combinations of Cutting Attachment, Deflector, Handle and Harness
Cutting Attachment Deflector, Limit Stop Handle Shoulder Strap/Harness
7
12
34
56
89
10
11
14
1318
15
2224
0000-GXX-0385-A0
12
16
17
1920
21
1920
21
21
23
23
24
24
25 

FS 90, FS 90 R
English
18
Approved Combinations
The complete combination includes:
–Cutting attachment
–Deflector
–Handle
–Shoulder strap/harness
Select correct combination from the 
table according to the cutting 
attachment you intend to use.
WARNING
For safety reasons only the cutting 
attachments, deflectors, handles and 
harnesses shown in each row of the 
table may be used together. No other 
combinations are permitted because of 
the risk of accidents.
Cutting Attachments
Mowing heads
1STIHL...