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MS 261 C-Q
English
55
EPA / CEPA
The Emission Compliance Period
referred to on the Emissions
Compliance Label indicates the number
of operating hours for which the engine
has been shown to meet Federal
emission requirements.
Category
Engine
STIHL single cylinder two-stroke engine
MS 261 C
Ignition System
Electronic magneto ignition
Fuel System
All position diaphragm carburetor with
integral fuel pump
Chain lubrication
Fully automatic, speed-controlled oil
pump with rotary piston. Additional
manual oil flow control
Weight
Cutting Attachment
Recommended cutting attachments
complying with Section 5.11 of ANSI B
175.1
-
2000.
Observe notes on ANSI B 175.1
-
2000
and definition of "low kickback chain" in
chapter on "Safety Precautions and
Working Techniques".
Rollomatic guide bars
.325" saw chain
Chain sprocket
To ensure compliance with the kickback
properties required in Section 5.11 of
ANSI B 175.1
-
2000, only use
replacement chains that, when used
with this specific powerhead, comply
with Section 5.11 of the ANSI standard
or are classed as "low kickback" chains
according to ANSI B 175.1
-
2000.
Please ask your STIHL dealer for the
latest recommendations on new
bar/chain combinations developed after
publication of this instruction manual.
Specifications
A = 300 hours
B = 125 hours
C = 50 hours
Displacement: 3.06 cu. in.
(50.2 cm
3
)
Bore: 1.76 in.
(44.7 mm)
Stroke: 1.26 in. (32 mm)
Engine power to
ISO 7293:
3.8 hp (2.8 kW)
at 9,500 rpm
Idle speed: 2,800 rpm
High speed setting
when performing
repairs (with bar and
chain): 14,000 rpm
Spark plug (resistor
type):
Bosch WSR 6 F,
NGK BPMR 7 A
Electrode gap: 0.02 in. (0.5 mm)
Fuel tank capacity: 16.9 fl.oz
(0.50 L)
Oil tank capacity: 9.1 fl.oz (0.27 L)
dry, without bar and
chain: 11.7 lbs (5.3 kg)
Reduced kickback STIHL guide bar
(with green label)
Cutting lengths: 16, 18, 20 in. (40,
45, 50 cm)
Pitch: .325" (8.25 mm)
Groove width: 0.063 in. (1.6 mm)
Nose sprocket: 11 teeth
Low kickback STIHL saw chain (with
green label)
Rapid Micro Comfort 3 (26 RMC3)
Pitch: .325" (8.25 mm)
Drive link gauge: 0.063 in. (1.6 mm)
7-tooth for .325"
57


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