Stihl MS 251 Manual

36 MS 231, MS 231 C, MS 251, MS 251 C
6.3.2 Clutch side
– Remove the clutch, b 4
– Remove the oil pump, b 11.3
: Remove the retaining ring (1).
Take care not to damage the
crankshaft stub.
– Free off the oil seal in its seat by
tapping it with a suitable tube or a
punch.
: Apply puller (1) 5910 890 4400.
– Clamp the puller arms.
– Pull out the oil seal.
2310RA083 TG
1
2310RA084 TG
1
Installing
– Clean the sealing face, b 14
– Lubricate sealing lips of new oil
seal with grease, b 14
: Fit the installing sleeve (1)
1118 893 4602.
: Slip the oil seal, open side facing
the engine housing, over the
installing sleeve.
– Remove the installing sleeve (1).
: Fit press sleeve (1)
1122 893 2405 with the
collar (arrow) facing the engine.
: Use press sleeve (1)
1122 893 2405 to install the oil
seal (2).
The seating face must be flat and
free from burrs.
2310RA085 TG
1
2310RA086 TG
1
2
: Fit the retaining ring (1).
– Reassemble all other parts in the
reverse sequence.
6.4 Shroud
: Take out the screws (arrows).
– Remove the shroud (1).
2310RA087 TG
1
1
2310RA088 TG
All manuals and user guides at all-guides.com

Stihl MS 251 Specifications

General

Idle speed	2800 RPM
Motor type	2-stroke motor
Chain pitch	1/308 \
Blade length	450 mm
Product color	Black, Grey, Orange
Motor speed (max)	10000 RPM
Oil tank capacity	0.2 L
Fuel tank capacity	0.39 L
Engine displacement	45.6 cm³
Kickback protection	Yes
Engine power	3 hp
Power source	Gasoline
Sound power level	114 dB
Vibration emission	3.9 m/s²
Sound pressure level	103 dB

Weight and Dimensions

Weight	4900 g