Stihl FS 50 Service Manual

70 Series 4144 Components FC, FS, KM
– Line up the gearbox (1) so that
the output shaft (2) points away
from the loop handle.
– Push the gearbox (1) on to the
drive tube (3) as far as stop.
: Tighten down the screw (arrow)
firmly.
: Push the flexible liner (1) into the
end of the drive tube with the
cross holes (arrows).
: Line up the flexible liner (1) so
that the cross holes (arrows) in
the drive tube are between the
spokes.
545RA254 TG
1
2
3
545RA249 TG
1
545RA255 TG
1
: Push the plug (1) into the end of
the drive tube with the cross
holes (arrows).
The drive shaft is supported in the
flexible liner inside the drive tube.
If the drive shaft has turned blue,
install a new one.
– Before installing the drive shaft,
coat it with STIHL gear lubricant
for hedge trimmers, b 11
– Apply the grease evenly to the
drive shaft.
Do not pump grease directly into
the drive tube or flexible liner.
: Push the drive shaft (1) into the
flexible liner (arrow) until it
engages the square recess in the
gearbox.
– Check operation.
1
545RA253 TG545RA250 TG
1
– Rotate the drive shaft – the
gearbox output shaft must rotate
too.
– Reassemble in the reverse
sequence.
Tightening torques, b 3.4
9.1.4 Disassembling
(FS 40, 50)
– Remove the drive tube, b 9.1
– Remove the loop handle if
necessary, b 9.1.6, b 9.1.7
– Remove the carrying ring if
necessary, b 9.2.3
: Take out the screw (arrow) and
remove the hex nut at the other
side.
– Pull off the deflector (1).
: Pull the drive shaft (1) out of the
drive tube.
If the drive shaft has turned blue,
install a new one.
545RA256 TG
1
1
545RA234 TG

Stihl FS 50 Specifications

General

Engine Displacement	27.2 cc
Power Output	0.8 kW
Engine Type	2-stroke
Shaft Type	Straight
Starter System	Recoil
Overall Length	147 cm
Vibration Level	4.5 m/s²