Stihl FS 91 R User Manual

FS 91, FS 91 R
English
14
WARNING
To reduce the risk of serious injury,
never use wire or metal-reinforced line
or other material in place of the nylon
cutting lines. Pieces of wire could break
off and be thrown at high speed toward
the operator or bystanders.
STIHL SuperCut mowing head
Fresh line is advanced automatically.
Frayed line is replaced by a simple
adjustment (see instruction sheet
supplied with mowing head).
STIHL AutoCut mowing head
Nylon cutting line advances
automatically when tapped against the
ground (TapAction).
STIHL TrimCut mowing head
Frayed line is replaced by a simple
adjustment (see instruction sheet
supplied with mowing head).
STIHL PolyCut mowing head
Uses either nylon lines or nonrigid,
pivoting polymer blades.
Observe wear indicators.
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) 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.
Risk of Kickout (Blade Thrust) with all
Rigid Cutting Blades
WARNING
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.
002BA177 KN
Kickout (blade thrust) is
the sudden and uncon-
trolled motion towards
the operator's right or
rear that can occur when
the shaded area (espe-
cially 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 counterclock-
wise rotation of the blade
may be stopped or
slowed, and the cutting
attachment may be
thrown to the right or to
the rear.
002BA135 KN

Stihl FS 91 R Specifications

General

Type	String trimmer
Cordless	Yes
Head type	Nylon line
Handle type	D-loop handle
Engine power	1.3 hp
Product color	Black, Metallic, Orange
Uncertainty K	2 m/s²
Rotational speed	8000 RPM
Number of strokes	4
Sound power level	107 dB
Fuel tank capacity	0.71 L
Vibration emission	3.7 m/s²
Engine displacement	28.4 cm³
Sound pressure level	96 dB
Cutting diameter (max)	- mm
Power source	Gasoline

Weight and Dimensions

Length	1800 mm
Weight	5500 g