Stihl MS 170 User Manual

57MS 170, MS 180, MS 180 C
English / USA
Engine
EPA:
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 A = 300 hours, B = 125 hours,
C = 50 hours
CARB:
The Emission Compliance Period used
on the CARB Air Index Label indicates
the terms:
Extended = 300 hours
Intermediate = 125 hours
Moderate = 50 hours
STIHL single cylinder two-stroke engine
MS 170
MS 180, MS 180 C
Magneto Ignition System
Electronic (breakerless)
Spark plug (suppressed)
Bosch WSR 6 F or NGK BPMR 7 A
Electrode gap
0.02 in (0.5 mm)
Fuel / Oil System
Diaphragm carburetor
All position with integral fuel pump
Fuel tank capacity
0.53 US pt (0.25 l)
Fuel mixture
See "Fuel"
Chain lubrication
Fully automatic, speed-controlled rotary
piston oil pump.
Oil tank capacity
0.31 US pt (0.145 l)
Weight
dry, without bar and chain
Cutting Attachment
Recommended cutting attachments
for compliance with § 5.11 of ANSI
standard B 175.1-2000
(see page 16 of this manual):
Guide bar
STIHL reduced kickback bar
(with green label) for 3/8" P pitch:
- Picco Micro Mini, groove width
0.04 in (1.1 mm)
- Picco Micro, groove width
0.05 in (1.3 mm)
Rollomatic with sprocket nose
12 or 14 in (30 or 35 cm)
Oilomatic chain
STIHL low kickback chain*
(with green label)
for 3/8" P pitch:
3/8" (9.32 mm) Picco-Micro Mini
(61 PMN)
3/8" (9.32 mm) Picco-Micro 1
(63 PM1, 63 PMC3)
Spur sprocket:
6-tooth for 3/8" P pitch
Since new bar/chain combinations may
be developed after publication of this
manual, ask your STIHL dealer for the
latest recommendations.
Displacement 1.84 cu.in (30.1 cm
3
)
Bore 1.46 in (37 mm)
Stroke 1.10 in (28 mm)
Idle speed 2,800 RPM
Displacement 1.94 cu.in (31.8 cm
3
)
Bore 1.50 in (38 mm)
Stroke 1.10 in (28 mm)
Idle speed 2,800 RPM
Specifications
MS 170 8.60 lbs (3.9 kg)
MS 170 Kat 9.0 lbs (4.1 kg)
MS 180 8.60 lbs (3.9 kg)
MS 180 Kat 9.30 lbs (4.2 kg)
MS 180 C
Easy2Start 9.30 lbs (4,2 kg)

Stihl MS 170 Specifications

General

Idle speed	- RPM
Chain pitch	3/8 \
Blade length	350 mm
Product color	Black, Orange, White
Automatic oiling	Yes
Oil tank capacity	0.145 L
Fuel tank capacity	0.25 L
Engine displacement	30.1 cm³
Engine power	1.7 hp
Power source	Gasoline

Weight and Dimensions

Weight	3900 g