Stihl MS 251 Manual

69MS 231, MS 231 C, MS 251, MS 251 C
9.3.2 Buffers on Filter Base
– Remove the filter base, b 12.3
: Take out the screw (1).
: Press the tank housing (2) down
a little and hold it there.
: Push out the buffers (1) from the
underside (arrows).
– Check the buffers (1) and replace
if necessary
2310RA249 TG
1
2
2310RA250 TG
11
Installing
: Position the buffers (1)
with their tapered ends facing the
bores (arrows).
– Use STIHL press fluid to simplify
assembly, b 14
: Push the tapered ends of the
buffers (1) fully into the
bores (arrows), turning them
back and forth to simplify
installation.
The tapered ends (arrows) must be
properly seated on the other sides
of the bores.
2310RA251 TG
11
2310RA252 TG
: Push the tank housing (1)
upwards and hold it there.
: Insert and tighten down the
screw (2) firmly.
– Reassemble all other parts in the
reverse sequence.
9.4 Handlebar
– Remove the shroud, b 6.4
: Take out the screw (1).
2310RA253 TG
2
1
2310RA242 TG
1
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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