TEST REPORT Stihl MS 261

TEST REPORT
Stihl MS 261
Test number: 6190
OWNER OF THE TEST CERTIFICATE:
Manufacturer and applicant:
Andreas Stihl AG & Co. KG
Badstrasse 115
D- 71336 Waiblingen
www.stihl.de
MS 261
MS 261 C-BE
MS 261 C-Q
MS 261 C-VW
6190 – Stihl MS 261
Test Results and Evaluations
Chain saws
STIHL MS 261 (standard model)
STIHL MS 261 C-Q (with Quickstop)
STIHL MS 261 C-BE (with Ergostart and quick chain tensioner)
STIHL MS 261 C-VW (handle and carburetor heating)
Tested with 40 cm Stihl Rollomatic saw bar and 36 RSC 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 = 2.8 kW
Md max at 2.4 kW
Engine
speed
9750 min-1
Torque
2.8 Nm
Spec. fuel
consumption
56 kW/l
7750 min-1
3.0 Nm
48 kW/l
N.E.
Fuel consumption
absolute / specific
Exhaust emissions
max. power
1.6 l/h
427 g/kWh
max. torque
1.4 l/h
434 g/kWh
+
o
Comply with type approval Level II of the guideline 2002/88/EG
Approval number: e1*97/68SH3-IIA*2004/26*0583*00
Chain lubrication
Oil consumption
at 5000 min-1
min / max
3 ml/min
at 9000 min-1
5 ml/min
4 ml/min
9 ml/min
o
Noise
idling speed
at ear of the operator
81 dB(A)
full load
speed
101 dB(A)
Full throttle no
load
105 dB(A)
Equivalent sound pressure level, according to DIN EN ISO 22868: 102 dB(A)
Acoustic power, according to DIN EN ISO 22868: 112 dB(A)
(average between: idling/ full load/ full throttle)
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o
6190 – Stihl MS 261
Vibration
idling speed
front handle
3,3 m/s²
full load
speed
2,8 m/s²
rear handle
1,7 m/s²
2,9 m/s²
Full throttle no
load
1,6 m/s2
2,4 m/s²
o
Total equivalent vibration according to DIN EN ISO 22867
front handle 2.6 m/s²; rear handle 2.4 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
Chain stop angle
N.E.
25 °
Weight
With cutting equipment
Weight per unit power
2.3 kg/kW
Without cutting equipment
1.9 kg/kW
+
Operability / handling
Control elements
Machine start
Easy to reach and use
o
Decompression valve present (only MS 261 / C-Q /
VW)
+
Easier starting of model MS 261 C-BE using mechanical starting aid (Ergostart) and manual fuel
pump
++
Combined switch for engine ON-OFF and CHOKE
+
Engine control
The setting range for the carburettor/idling screw
has been restricted because the carburettor is factory adjusted for emission optimization
o
Chain assembly
Easy to reach and operate
o
Simple, side chain tensioner
o
Model MS 261 C-BE, side tensioner under the
chain sprocket cover, no tools required
+
Chain tensioning
Fuel tank
Fuel tank covers can be opened without tools, easy
to access
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o
6190 – Stihl MS 261
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
N.E.
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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6190 – Stihl MS 261
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 3/8“ guage 1.6 mm
- Various guide bar lengths and chain types (incl. Versions with 0.325“ guage) 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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6190 – Stihl MS 261
Test
Test facilities
Kuratorium für Waldarbeit und Forsttechnik, Gross-Umstadt
DLG-Testzentrum Technik & Betriebsmittel, Gross-Umstadt
Field test
NFBZ Münchehof
Forestry training centre Ort, A-Gmunden
Forestry office Ehringshausen
Authors
P. Müßig, KWF, Gross-Umstadt
J. Albert, DLG, Gross-Umstadt
FPA/DLG- Test commission
“Geräte und Werkzeuge“(“Equipment and tools”)
Chairman: Sebastian Paar, FBZ Laubau
FPA/DLG-approval until April 2017
In acknowledgment of the performance in the KWF test, the approved product is also licensed to carry the following test signs:
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: [email protected]
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: [email protected]
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: [email protected]
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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