The new MS 251 is ideal for a variety of applications, from cutting firewood to timber construction. This high torque engine is easy to start and comfortable to use, with a high cutting performance. Emissions are cut by 70% and fuel consumption is up to 20% lower compared to a STIHL 2-stroke engine of the same power output without 2-MIX technology.
 
 
Displacement cm³
45.6
Power output kW/bhp
2.2/3
Bar length cm
40-45
Bar length "
16-18
Weight kg 1)
4.8
Weight kg 2)
5.67 / 5.88
Power-to-weight ratio kg/kW
2.2
Sound pressure level dB(A) 3)
103
Sound power level dB(A) 3)
114
Vibration values left/right m/s² 4)
3.9/3.9
STIHL Oilomatic saw chain pitch/type
.325" RM
STIHL Oilomatic saw chain pitch/type
.325"
Oil pump
Not adjustable
Tank volume l
0.39
Chain pitch
.325"
Chain tensioning
Side chain tension
Sprocket - number of teeth
7.7 Z
Filter
Long-term filter system / round cartridge filter
Filter material
Flocked,Nonwoven tissue
Bumper spike
Steel claw
Cylinder
Chrome
Oil tank volume cm3
200
Sprocket
Profile chain row,Sprocket profile
Anti vibration system
AV Steel Spring,AV System, steel spring
Filler cap
Tools,WTV tool-free tank cap
EPA Certified fuel consumption l/h
1.075
CO2 g/kWh
862
Handle type
Standard grip,Standard handle
Exhaust
Standard muffler,Standard silencer
Carburettor
Compensator / Limiter Caps / scavenging / Carburetor,Limiter caps / compensator / carburetor preheating / flushing reservoir
Speed at maximum power rpm
10.000
EPA Certified fuel consumption glh
0.284