Stihl Fs 450 K Manual

10 English / USA
FS 300, FS 350, FS 400, FS 450, FS 480 California and some other authorities, 
for instance, have published lists of 
substances known to cause cancer, 
reproductive toxicity, etc.
Control dust and fumes at the source 
where possible. In this regard use good 
work practices and follow the 
recommendations of OSHA/NIOSH and 
occupational and trade associations. 
When the inhalation of toxic dust and 
fumes cannot be eliminated, the 
operator and any bystanders should 
always wear a...

11 FS 300, FS 350, FS 400, FS 450, FS 480English / USA
!
Warning!
Before cutting, inspect the 
area for stones, glass, 
pieces of metal, trash or 
other solid objects. The 
cutting attachment could 
throw objects of this kind.
!
Warning!
When using rigid blades, avoid cutting 
close to fences, sides of buildings, tree 
trunks, stones or other such objects that 
could cause the clearing saw to kick out 
or could cause damage to the blade. 
STIHL recommends use of the nylon line 
heads or PolyCut head for...

12 English / USA
FS 300, FS 350, FS 400, FS 450, FS 480!
Warning!
Keep hands and feet 
away from cutting tool. 
Never touch a rotating 
cutting tool with your hand 
or any part of your body. It 
continues to rotate for a 
short period after the throttle trigger is 
released (flywheel effect).
Important adjustments
!
Warning!
To reduce the risk of personal injury from 
loss of control or contact with the 
running cutting tool, do not use a cutting 
tool with incorrect idle adjustment. At 
correct idle...

13 FS 300, FS 350, FS 400, FS 450, FS 480English / USA
!
Warning!
Never test the ignition system with 
ignition wire boot removed from spark 
plug or with unseated spark plug, since 
uncontained sparking may cause a fire.
!
Warning!
Do not operate your clearing saw if the 
muffler is damaged, missing or modified. 
An improperly maintained muffler will 
increase the risk of fire and hearing loss. 
Never touch a hot muffler or burn will 
result. If your muffler was equipped with 
a spark-arresting screen...

14 English / USA
FS 300, FS 350, FS 400, FS 450, FS 480 A damaged clutch may cause a cutting 
attachment to rotate at idle speed and 
increase the risk of personal injury from 
loss of control and from contact with the 
cutting tool.
The STIHL SuperCut, TrimCut, AutoCut 
and PolyCut mowing heads produce a 
clean and tidy finish.
They are to be used only on brush-
cutters equipped with a limiter blade in 
the deflector in order to keep the line at 
the proper length (see Parts and 
Controls chapter of...

15 FS 300, FS 350, FS 400, FS 450, FS 480English / USA
Using the grass cutting bladeAll kinds of grass and weeds can be 
easily cut with the grass cutting blade. 
The clearing saw is swept in an arc 
similar to a scythe.!
Warning!
To reduce the risk of serious or fatal 
injury never attempt to cut woody 
materials.
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.The 8-tooth grass cutting blade is...

16 English / USA
FS 300, FS 350, FS 400, FS 450, FS 480Using the circular saw bladeCircular saw blades are suitable for 
thinning brush and cutting small trees up 
to a diameter of 4 cm (1 9/16). Do not 
attempt to cut trees with larger 
diameters, since the blade may catch or 
jerk the clearing saw forward. This may 
cause damage to the blade or loss of 
control of the clearing saw which may 
result in serious injury.When the clearing saw with circular saw 
blade is used to cut down small trees, 
STIHL...

17 FS 300, FS 350, FS 400, FS 450, FS 480English / USA
Risk of kickout (blade thrust)
with all rigid cutting blades
!
Warning!
Kickout (blade thrust) is the sudden and 
uncontrolled motion towards the 
operators right or rear that can occur 
when the shaded area of the rotating 
blade comes in contact with a solid 
object like a tree, rock, bush or wall. The 
rapid counterclockwise rotation of the 
blade may be stopped or slowed, and 
the cutting attachment may be thrown in 
an area to the right or to...

18 English / USA
FS 300, FS 350, FS 400, FS 450, FS 480Cutting toolsMowing heads
  1STIHL SuperCut 40-2
  2STIHL AutoCut 40-2
  3STIHL AutoCut 40-4 
1)
  4STIHL TrimCut 40-2
  5STIHL PolyCut 40-3
Metal mowing tools
  6Grass cutting blade 230-4
  7Grass cutting blade 255-8
  8Brush knife 300-3
Circular saw blades
  9Chisel tooth 
circular saw blade 200
10Scratcher tooth 
circular saw blade 200
11Chisel tooth 
circular saw blade 225 
2)
12Scratcher tooth 
circular saw blade 225 
2)
1)
for FS 450, 450 K,...

19 FS 300, FS 350, FS 400, FS 450, FS 480English / USA
Cutting tools Deflectors, Limit Stops Harnesses
681FK008681FK001
681FK007
681FK011
5 1
681FK037 KN
4
2
3
681BA004 KN
13
681BA003 KN
14
002BA026 KN002BA006 K
18
19
681FK015
8
681FK014
7
6
681BA005 KN
15
681FK018
681FK016
910
681BA007 KN
16
681FK016
681FK018
11
12
681BA006 KN
17