TEST REPORT Stihl MS 261 CM

TEST REPORT
Stihl MS 261 C-M
Test number: 6909
OWNER OF THE TEST CERTIFICATE:
Manufacturer and applicant:
Andreas Stihl AG & Co. KG
Badstrasse 115
D- 71336 Waiblingen
www.stihl.de
MS 261 C-M
MS 261 C-MVW
MS 261 C-BM
MS 261 C-MQ
6909 – Stihl MS 261 C-M
Test Results and Evaluations
Chain saws
STIHL MS 261 C M (with electronic engine management)
STIHL MS 261 C MQ (with electronic engine management and Quickstop)
STIHL MS 261 C BEM (with electronic engine management, Ergostart and quick chain tensioner)
STIHL MS 261 C M VW (with electronic engine management, handle and carburetor heating)
Tested with 40 cm Stihl Rollomatic E saw bar and 26 RM saw chain
Andreas Stihl AG & Co. KG; Badstrasse 115; D- 71336 Waiblingen
Test item
Test results
Class
Chain saw in the power class up to 3 kW
for professional use
Evaluation
Engine power
P max = 3,0 kW
Md max bei 2,6 kW
Engine
speed
10000 min-1
Torque
2.8 Nm
Spec. fuel
consumption
59 kW/l
8000 min-1
3.1 Nm
52 kW/l
N.E.
Fuel consumption
absolute / specific
max. power
1.8 l/h
447 g/kWh
max. torque
1.6 l/h
467 g/kWh
+
Exhaust emission
o
Guideline 2012/46/EG
Approval number: e1*97/68SH3-IIA*2012/46*0757*00
Chain lubrication
Oil consumption
min / max
at 5000 min-1
3 ml/min
at 9000 min-1
5 ml/min
4 ml/min
9 ml/min
o
Noise
at ear of the operator
idling speed
87 dB(A)
full load speed Full throttle no load
104 dB(A)
107 dB(A)
Equivalent sound pressure level according to DIN EN ISO 22868: 104 dB(A)
Acoustic power according to DIN EN ISO 22868: 116 dB(A)
(average of full load/full throttle)
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6909 – Stihl MS 261 C-M
Test item
Test results
Evaluation
Vibration
front handle
idling speed
3.0 m/s²
full load speed Full throttle no load
4.5 m/s²
3.0 m/s2
rear handle
3.0 m/s²
4.5 m/s²
3.0 m/s²
o
Total equivalent vibration according to DIN EN ISO 22867
Front handle 3.5 m/s²; rear handle 3.5 m/s²
Chain brake
Handguard activation
Inertia activation
Actuating
force
25 N
aver. braking time
0,05 s
horizontal acceleration
387 m/s²
max. braking
time
0,07 s
N.E.
vertical acceleration
738 m/s²
Kickback
Kickback angle
N.E.
25 °
Weight
Weight per unit power
With cutting equipment
Without cutting equipment
2.1 kg/kW
1.7 kg/kW
+
Operability / handling
Control elements
Easy to reach and use
o
Machine start
Decompression valve
+
Combined switch for: motor ON-OFF and CHOKE
+
Engine control
Models with electronic engine control do not have
regulator screws.
++
Chain assembly
Easy to access and use
o
Chain tensioning
simple, tensioning on the side of machine
o
model MS 261 C-BM, side tensioner under the
chain sprocket cover, no tools required
+
Refilling
Fuel tank covers can be opened without tools, easy
to access
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o
6909 – Stihl MS 261 C-M
Test item
Test results
Evaluation
Maintenance
Engine, air filter and spark
plug cover, casing
Simple, clips removable using combination wrench
o
Air filter
No tools required
+
low
+
Reliability
The piston ring broke in one test model. No further
damages following the repair during the test
o
Operating manual
clear, well illustrated
+
cleaning
soiling
Operator safety
EG-type examination test
DPLF K-EG-2009/5306
GS- Test
DPLF K-GS-2009/5307
o. B.
Rating: ++ / + / o / - / --./.(o = Standard / NE= no evaluation, complies with tolerance value)
Threshold values and evaluation criteria are described in the “Information for the Utility Value Test”
available from the DLG and KWF.
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6909 – Stihl MS 261 C-M
Description and technical data
Engine
- Air-cooled single-cylinder two-stroke engine
- Displacement 50.2 cm³; bore 44.7 mm; stroke 32 mm
- Fuel: minimum octane number 90ROZ (Mixture 1:50) or two-stroke special fuel with “KWFTest”; manufacturers recommendation: Stihl MotoMix
- Spark plug NGK BPMR 7A
- Idling speed 2800 min-1; max. speed 14000 min-1
Cutting equipment
- Clutch drum with external chain sprocket
- Guide bar with 11 tooth sprocket nose
- Half or full chisel tooth chain
- Pitch 0.325“ guage 1.6 mm
- Various guide bar lengths and chain types available for this saw model
Main dimensions and weights MS 261 (measured values)
Length
Width
Height
Stump height
Tank volume
Weight
incl. cutting equipment 35 cm
785 mm
engine unit without spiked bumper
425 mm
engine unit
180 mm
incl. handle
245 mm
engine unit
205 mm
with front hand guard
285 mm
chain sprocket cover
20 mm
handle
30 mm
fuel
500 ml
chain oil
270 ml
incl. cutting equipment 35 cm
6,4 kg
without cutting equipment
5,2 kg
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6909 – Stihl MS 261 C-M
Test
Test facilities
Kuratorium für Waldarbeit und Forsttechnik, Gross-Umstadt
DLG-Testzentrum Technik & Betriebsmittel, Gross-Umstadt
Field test
Forstliches Bildungszentrum Königsbronn
Forstliche Ausbildungsstätte Ort, A-Gmunden
Waldwirtschaft Verband Schweiz Solothurn
Authors
P. Müßig, KWF, Gross-Umstadt
W.Stindtt, DLG, Gross-Umstadt
FPA/DLG- Test commission
“Geräte und Werkzeuge“(“Equipment and tools”)
Chairman: Sebastian Paar, FBZ Laubau
FPA/DLG-approval until January 2019
In acknowledgment of the performance in the KWF test, the approved product is also licensed to
carry the following test signs: “Passed DLG SIGNUM TEST “
Published by
DLG-Testzentrum Technik & Betriebsmittel
Max-Eyth-Weg 1
D-64823 Gross-Umstadt
Telephone: +49 069/24788-652
Fax: +49 069/24788/110
E-mail: J.Albert@dlg.org
Internet: www.dlg-test.de
ENTAM European Network for Testing of Agricultural Machines
c/o ENAMA
Via Venafro, 5
I-00159 Rome
Telephone: +39 06 40860030
Fax: +39 06 4076264
E-mail: inf@entam.com
Internet: www.entam.com
Kuratorium für Waldarbeit und Forsttechnik e.V.
Forsttechnischer Prüfungsausschuss (FPA)
Spremberger Strasse 1
D-64823 Gross-Umstadt
Telephone: +49 06078/785-0
Fax: +49 06078/785 50
E-mail: Muessig@kwf-online.de
Internet: www.kwf-online.de
Supported by the Federal Ministry of Consumer Protection, Food and Agriculture per decision by the German Bundestag and the State Forest Administrations
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