Stihl MS 261 User Manual

48 MS 261, MS 261 C
Clutch side of crankcase
: Use a punch to carefully drive out
the oil seal.
– Check and clean the crankcase
or replace if necessary.
– If this half of the crankcase is in
order, install a new ball bearing.
– Heat the area of the bearing seat
to about 160°C (320°F).
The bearing (1) drops out as soon
as this temperature is reached.
5902RA149 TG5902RA150 TG
1
Installing
As the bearing seat in the clutch half
of the crankcase has no locating
face, the oil pump must be installed
first
– the oil pump serves as a locating
face.
– Install the oil pump, b
b
11.3
– Heat the area of the bearing seat
to about 160°C (320°F).
– Position the ball bearing so that
the centering ring (arrow) points
toward the oil pump.
: Push the ball bearing home as far
as stop (oil pump).
This operation must be carried out
quickly because the bearing
absorbs heat and begins to expand.
– Check that ball bearing is
properly seated. If necessary,
use press arbor 1118 893 7200 to
carefully press the bearing fully
home until it butts against the oil
pump.
– Remove the oil pump,
b
11.3
– Install the crankshaft,
b
6.6
– Install the oil seals,
b
6.3
– Reassemble all other parts in the
reverse sequence.
5902RA151 TG
6.7 Piston
Before removing the cylinder,
decide whether or not the
crankshaft has to be removed as
well, b
b
6.6
– Remove the cylinder,
b
6.5
It is not necessary to remove the
snap ring at the clutch side.
: At the ignition side, apply a
suitable tool to the recess (arrow)
and ease the hookless snap ring
out of the piston boss.
5902RA152 TG

Stihl MS 261 Specifications

General

Motor type	2-stroke motor
Chain gauge	1.6 mm
Chain pitch	3/8 \
Blade length	400 mm
Automatic oiling	Yes
Oil tank capacity	0.27 L
Fuel tank capacity	0.5 L
Engine displacement	50.2 cm³
Engine power	3.8 hp
Power source	Gasoline

Weight and Dimensions

Weight	5200 g