Stihl FS 90 Instruction Manual page 18

Using the Circular Saw Blade
Circular saw blades are suitable for
thinning brush and cutting small trees up
to a diameter of 4 cm (1 1/2"). Do not
attempt to cut trees with larger
diameters, since the blade may catch or
jerk the trimmer/brushcutter forward.
This may cause damage to the blade or
loss of control of the power tool and
result in serious injury. Use a chain saw
for such work.
FS 90, FS 90 R
!
Warning!
To reduce the risk that the blade will
crack and/or break, avoid all contact with
stones, rocks or the ground. Sharpen
blades in a timely manner as specified –
dull teeth may cause the blade to crack
or shatter.
When a trimmer/brushcutter with a
circular saw blade is used to cut down
small trees, STIHL recommends that the
standard deflector be removed and
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
briefly again below).
English / USA
Before starting the cut, accelerate the
engine up to full throttle. Perform cut
with uniform pressure. STIHL
recommends that the circular saw blade
be applied to the right of the tree, using
the non-shaded area of the blade, as
shown in the illustration above.
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