Stihl MS 251 Manual

76 MS 231, MS 231 C, MS 251, MS 251 C
10.3.3 Choke Rod
– Remove the air filter, b 12.1
: Set the switch lever (1) to "
F" and
ease the choke rod (2) out of its
seat (arrow).
: Disconnect the choke rod (2)
from the lever (3).
– Check the choke rod and replace
it if necessary
Installing
: Engage the choke rod (1) in the
bore (arrow) in the choke
shaft (2).
3
2310RA192 TG
1
2
2
2310RA193 TG
1
: Position the choke rod (1) in the
guide (arrow).
: Set the switch lever (2) to "
F",
hold it in that position and then
push the choke rod (1) fully into
its seat (arrow).
– Check operation
Check that the choke rod is properly
seated.
– Reassemble all other parts in the
reverse sequence.
10.3.4 Throttle Rod
– Remove the throttle trigger,
b 10.2,
QuickStop Super, b 10.3
– Remove the choke rod,
b 10.3.3
– Remove the baffle, b 12.2
: Pry the filter base (1) out of the
buffer (2).
2310RA194 TG
2
1
2
2310RA195 TG
1
: Pull the filter base (1) off the
studs (arrows).
: Pull the filter base (1) out of the
buffer (2).
: Pull the short circuit wire (1) and
ground wire (2) out of the
guides (arrows).
– Put the filter base to one side so
that the wires are not under
tension.
2310RA198 TG
1
2
2310RA197 TG
1
2
2310RA196 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