Stihl MS 251 Manual

102 MS 231, MS 231 C, MS 251, MS 251 C
: Ease the handlebar (1) sideways
and take it out of the guide
(arrow).
Machines with QuickStop Super
When the tank housing is lowered,
the brake cable grommet is pulled
out of the adjusting screw
– this may change the adjustment of
the brake cable.
: Take out the screw (1) and pull
the retainer (2) out of its seat.
2310RA375 TG
1
1
2
2310RA057 TG
All models
– Lower the tank housing.
: Pull the fuel hose (1) downwards
and out through the
opening (arrow).
: Pull out the fuel hose (1) with
connector.
: Pull the connector (1) off the fuel
hose (2).
– Remove the pickup body,
b 12.11.1
2310RA376 TG
1
2310RA377 TG
1
2
2310RA378 TG
1
: Pull the fuel suction hose (1) out
of the fuel tank.
– Replace the fuel hose and fuel
return hose. Check the connector
and replace if necessary.
Installing
: Push the fuel hose (1) through
the bore (arrow) in the fuel tank.
2310RA379 TG
1
2310RA380 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