Stihl FS 90 Instruction Manual page 16

STIHL PolyCut mowing head
Uses either nylon lines or nonrigid,
pivoting polymer blades.
!
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.
FS 90, FS 90 R
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) on the base are
missing or worn – see right illustration
above. The mowing head may otherwise
shatter and flying objects could result in
injury to the operator or bystanders.
Install a new mowing head.
English / USA
Risk of Kickout (Blade Thrust)
with All Rigid Cutting Blades
!
Warning!
Kickout (blade thrust) is the sudden and
uncontrolled motion towards the
operator's right or rear that can occur
when the shaded area (especially the
darkly shaded area) of a rotating blade
comes in contact with a solid rigid 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 to the
right or to the rear.
This kickout (blade thrust) may cause
loss of control of the power tool and may
result in serious or fatal injury to the
operator or bystanders. To reduce the
risk of injury, extreme caution should be
used when cutting with the shaded area
of any rigid blade.
15