Instruction Manual

Oil tank capacity:
200 cc (0.2 l)
32.5 Weight
dry, without bar and chain
MS 231: 4.8 kg
MS 231 C with ErgoStart and quick
chain tensioner:
5.1 kg
MS 251: 4.8 kg
MS 251 C with ErgoStart and quick
chain tensioner:
5.1 kg
32.6 Cutting Attachment
Actual cutting length may be less than the speci‐
fied length
32.6.1 .325" Rollomatic E guide bars
Cutting lengths: 35, 40, 45 cm
Pitch: .325" (8.25 mm)
Groove width: 1.6 mm
Nose sprocket: 11-tooth
32.6.2 3/8" P Rollomatic E guide bars
Cutting lengths: 30, 35, 40, 45 cm
Pitch: 3/8" P (9.32 mm)
Groove width: 1.3 mm
Nose sprocket: 9-tooth
32.6.3 .325" chain
Rapid Micro 3 (26 RM3) Type 3634
Rapid Duro 3 (26 RD3) Type 3667
Pitch: .325" (8.25 mm)
Drive link gauge: 1.6 mm
32.6.4 3/8" P chain
Picco Micro 3 (63 PM3) Type 3636
Picco Super 3 (63 PS3) Type 3616
Picco Duro 3 (63 PD3) Type 3612
Pitch: 3/8" P (9.32 mm)
Drive link gauge: 1.3 mm
32.6.5 Chain sprocket
7-tooth for .325"
Max. chain velocity to ISO 11681:
25.6 m/s
Chain speed at maximum power
output:
19.3 m/s
6-tooth for 3/8" P
Max. chain velocity to ISO 11681:
24.8 m/s
Chain speed at maximum power
output:
18.6 m/s
32.7 Noise and Vibration Data
For further details on compliance with Vibration
Directive 2002/44/EC see www.stihl.com/vib.
32.7.1 Sound pressure level L
p
to ISO 22868
MS 231: 103 dB(A)
MS 231 C: 103 dB(A)
MS 251: 103 dB(A)
MS 251 C: 103 dB(A)
32.7.2 Sound power level L
w
to ISO 22868
MS 231: 114 dB(A)
MS 231 C: 114 dB(A)
MS 251: 114 dB(A)
MS 251 C: 114 dB(A)
32.7.3 Vibration measurement a
hv, eq
to
ISO 22867
Handle, left Handle,
right
MS 231:
3.9 m/s
2
3.9 m/s
2
MS 231 C:
3.9 m/s
2
3.9 m/s
2
MS 251:
3.9 m/s
2
3.9 m/s
2
MS 251 C:
3.9 m/s
2
3.9 m/s
2
The K‑factor in accordance with Directive
2006/42/EC is 2.0 dB(A) for the sound pressure
level and sound power level; the K‑factor in
accordance with Directive 2006/42/EC is
2.0 m/s
2
for the vibration level.
32.8 REACH
REACH is an EC regulation and stands for the
Registration, Evaluation, Authorisation and
Restriction of Chemical substances.
For information on compliance with the REACH
regulation (EC) No. 1907/2006 see
www.stihl.com/reach.
32.9 Exhaust Emissions
The CO
2
value measured in the EU type approval
procedure is specified at www.stihl.com/co2.
The measured CO
2
value was determined on a
representative engine in accordance with a
standardized test procedure under laboratory
conditions and does not represent either an
explicit or implied guarantee of the performance
of a specific engine.
The applicable exhaust emission requirements
are fulfilled by the intended usage and mainte‐
nance described in this instruction manual. The
type approval expires if the engine is modified in
any way.
33 Ordering Spare Parts
Please enter your saw model, serial number as
well as the part numbers of the guide bar and
saw chain in the spaces provided. This will make
re-ordering simpler.
The guide bar and saw chain are subject to nor‐
mal wear and tear. When purchasing these
parts, always quote the saw model, the part
numbers and names of the parts.
33 Ordering Spare Parts English
0458-737-0121-C 41