Instruction Manual

MS 271, MS 271 C, MS 291, MS 291 C
English
47
Engine
STIHL single cylinder two-stroke engine
MS 271, MS 271 C
MS 291, MS 291 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 reciprocating piston
Weight
Cutting attachment MS 271, MS 271 C
The actual cutting length can be less
than the specified cutting length.
Saw chains .325"
Rollomatic E guide bars
Chain sprocket
Cutting attachment MS 291, MS 291 C
The actual cutting length can be less
than the specified cutting length.
Saw chains .325"
Rollomatic E guide bars
Saw chains 3/8"
Specifications
Displacement: 50.2 cm
3
Cylinder bore: 44.7 mm
Piston stroke: 32 mm
Engine power accord-
ing to ISO 7293:
2.6 kW (3.5 HP)
at 9500 rpm
Idle speed:
1)
2800 rpm
Displacement: 55.5 cm
3
Cylinder bore: 47.0 mm
Piston stroke: 32 mm
Engine power accord-
ing to ISO 7293:
2.8 kW (3.8 HP)
at 9500 rpm
Idle speed:
1)
1)
to ISO 11681 +/- 50 rpm
2800 rpm
Spark plug
(suppressed):
Bosch WSR 6 F,
NGK BPMR 7 A
Electrode gap: 0.5 mm
Fuel tank capacity: 500 cm
3
(0.5 l)
Oil tank capacity: 240 cm
3
(0.24 l)
Dry, without cutting attachment
MS 271: 5.6 kg
MS 271 C with ErgoStart and
quick chain tensioner: 6.2 kg
MS 291: 5.6 kg
MS 291 C with ErgoStart and
quick chain tensioner: 6.2 kg
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
Cutting lengths: 32, 37, 40 cm
Pitch: .325" (8.25 mm)
Groove width: 1.6 mm
Sprocket nose: 11 tooth
7-tooth for .325"
Max. chain speed to
ISO 11681: 24.4 m/s
Chain speed at maximum
power output: 19.3 m/s
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
Cutting lengths: 37, 40, 45 cm
Pitch: .325" (8.25 mm)
Groove width: 1.6 mm
Sprocket nose: 11 tooth
Rapid Micro (36 RM) Type 3652
Rapid Micro 3 (36 RM3) Type 3664
Rapid Super (36 RS) Type 3621
Rapid Super 3 (36 RS3) Type 3626
Pitch: 3/8" (9.32 mm)
Drive link gauge: 1.6 mm