Specifications - Stihl MS 261 C-M Instruction Manual

Specifications

Engine
STIHL single cylinder two-stroke engine
Displacement: 50.2 cc
Bore: 44.7 mm
Stroke: 32 mm
Engine power to 3.0 kW (4.1 bhp)
ISO 7293: at 10,000 rpm
1)
Idle speed: 2,800 rpm
1)
to ISO 11681 +/- 50 rpm
Ignition System
Electronic magneto ignition
Spark plug (resistor Bosch WSR 6 F,
type): NGK BPMR 7 A
Electrode gap: 0.5 mm
Fuel System
All position diaphragm carburetor with
integral fuel pump
Fuel tank capacity: 500 cc (0.5 l)
Chain Lubrication
Fully automatic, speed-controlled oil
pump with rotary piston. Additional
manual oil flow control
Oil tank capacity: 270 cc (0.27 l)
MS 261 C-M
Weight
dry, without bar and chain
MS 261 C-M:
MS 261 C-M with quick chain
adjuster:
MS 261 C-M with handle and
carburetor heating:
Cutting Attachment
Actual cutting length may be less than
the specified length
Rollomatic guide bars
Cutting lengths
(.325" pitch) 32, 37, 40, 45 cm
Groove width: 1.6 mm
Nose sprocket: 11-tooth
.325" chain
Rapid Micro (26 RM) Type 3629
Rapid Micro 3 (26 RM3) Type 3634
Rapid Super (26 RS) Type 3639
Pitch: .325" (8.25 mm)
Drive link gauge: 1.6 mm
Chain sprocket
7-tooth for .325"
Max. chain velocity to
ISO 11681:
Chain speed at maximum
power output:
Noise and Vibration Data
For further details on compliance with
Vibration Directive 2002/44/EC visit
4.9 kg
www.stihl.com/vib.
5.1 kg
Sound pressure level L
105 dB(A)
5.0 kg
Sound power level L
116 dB(A)
Vibration measurement a
22867
Left handle:
Right handle:
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
for the vibration level.
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.
25,6 m/s
Exhaust Emissions
19,3 m/s
The CO value measured in the EU type
2
approval procedure is specified at
www.stihl.com/co2.
English
to ISO 22868
p
to ISO 22868
w
to ISO
hv,eq
2
3.5 m/s
2
3.5 m/s
2
47