Stihl MS 251 Manual

54 MS 231, MS 231 C, MS 251, MS 251 C
Installing
: Push the sleeve (1) into the
loop (arrow) of contact spring (2)
as far as stop.
: Position the contact spring (1)
against the guide (arrows).
: Lift the contact spring (1) a little
and ease it over the tab (arrow).
– take care not to overstretch the
contact spring.
Before pushing the contact
spring (1) fully home, lift it a little
and ease it over the switch level –
no more than 2 mm.
2310RA424 TG
1
2
2310RA152 TG
2
1
2310RA153 TG
1
: Push the contact spring (1) into
the guide (arrows) until it is
engaged by the tab.
– Install the filter base, b 12.3
: Check operation
– short circuit wire's terminal
sleeve must touch the contact
spring (arrow) in position "
0".
– Reassemble all other parts in the
reverse sequence.
2310RA154 TG
1
2310RA155 TG
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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