Stihl MS 391 User Manual

54 MS 311, MS 391
: Thread the starter rope (1)
through the guide bushing
(arrow).
: Thread the starter rope (1)
through the side of the rope rotor.
– Secure the rope (1) with a simple
overhand knot.
: Pull the rope (1) back into the
rotor until the knot locates in the
recess (arrow).
4903RA133 TG
1
4903RA134 TG
1
4903RA135 TG
1
– Tension the rewind spring, b 8.6
– Install the segment and fan
housing, b 8.2
– Reassemble all other parts in the
reverse sequence.
8.6 Tensioning the Rewind
Spring
– Remove the fan housing and the
segment, b 8.2
: Pull out a short length of starter
rope (1).
: Use the starter rope (1) to rotate
the rope rotor (2) six turns
clockwise.
The rewind spring is now tensioned.
Hold the rope rotor steady since it
will otherwise spin back and may
damage the rewind spring.
4903RA136 TG
1
2
– Hold the rope rotor (2) steady.
: Pull out the twisted rope (1) with
the starter grip and straighten it
out.
– Hold the starter grip (1) firmly to
keep the rope tensioned.
: Let go of the rope rotor and
slowly release the starter rope so
that it can rewind properly.
4903RA137 TG
2
1
4903RA138 TG
1

Stihl MS 391 Specifications

General

Motor type	2-stroke motor
Chain gauge	1.6 mm
Chain pitch	3/8 \
Automatic oiling	Yes
Oil tank capacity	0.35 L
Fuel tank capacity	0.6 L
Engine displacement	64.1 cm³
Engine power	4.4 hp
Power source	Gasoline

Weight and Dimensions

Weight	6200 g