Instruction Manual

MS 171, MS 181, MS 181 C, MS 211, MS 211 C
English
58
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
CARB
The Emission Compliance Period used
on the CARB-Air Index Label indicates
the terms:
Engine
STIHL single cylinder two-stroke engine
MS 171
MS 181, MS 181 C
MS 211, MS 211 C
Ignition system
Electronic magneto ignition
(breakerless)
Fuel system
All position diaphragm carburetor with
integral fuel pump
Chain lubrication
Fully automatic, speed-controlled oil
pump with rotary piston
Weight
Cutting Attachments
Recommended cutting attachments
conforming with the 45 degree
computed kickback angle requirement
of Section 5.11 of
ANSI/OPEI B175.1-2012 when used on
Specifications
A = 300 hours
B = 125 hours
C = 50 hours
Extended = 300 hours
Intermediate = 125 hours
Moderate = 50 hours
Displacement: 1.94 cu. in.
(31.8 cm
3)
Bore: 1.6 in. (38 mm)
Stroke: 1.1 in. (28 mm)
Engine power to
ISO 7293:
1.7 hp (1.3 kW) at
10,000 rpm
Idle speed: 2,800 rpm
Maximum permissi-
ble speed with bar
and chain: 13,500 rpm
Displacement: 1.94 cu. in.
(31.8 cm
3)
Bore: 1.6 in. (38 mm)
Stroke: 1.1 in. (28 mm)
Engine power to
ISO 7293:
2.0 hp (1.5 kW) at
10,000 rpm
Idle speed: 2,800 rpm
Maximum permissi-
ble speed with bar
and chain: 13,500 rpm
Displacement: 2.15 cu. in.
(35.2 cm
3)
Bore: 1.7 in. (40 mm)
Stroke: 1.1 in. (28 mm)
Engine power to
ISO 7293:
2.3 hp (1.7 kW)
at 10,000 rpm
Idle speed: 2,800 rpm
Maximum permissi-
ble speed with bar
and chain: 13,500 rpm
Spark plug
(suppressed): NGK CMR6H
Bosch USR4AC
Electrode gap: 0.02 in. (0.5 mm)
Fuel tank capacity: 9.1 fl.oz (0.27 l)
Oil tank capacity: 9.0 fl.oz (0.265 l)
dry, without bar and chain
MS 171: 9.5 lbs. (4.3 kg)
MS 181: 9.5 lbs. (4.3 kg)
MS 181 C: 10.1 lbs. (4.6 kg)
MS 211: 9.5 lbs. (4.3 kg)
MS 211 C: 10.1 lbs. (4.6 kg)