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Specifications

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

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

Engine

STIHL single cylinder two-stroke engine

MS 170

 

Displacement:

1.84 cu. in.

 

(30.1 cm3)

Bore:

1.45 in. (37 mm)

Stroke:

1.1 in (28 mm)

Engine power to

1.7 hp (1.3 kW) at

ISO 7293:

8,500 rpm

Idle speed:

2,800 rpm

50

 

MS 180 C

 

Displacement:

1.94 cu. in.

 

(31.8 cm3)

Bore:

1.50 in. (38 mm)

Stroke:

1.1 in (28 mm)

Engine power to

2.0 hp (1.5 kW) at

ISO 7293:

9,000 rpm

Idle speed:

2,800 rpm

Ignition System

 

Electronic magneto ignition

(breakerless)

 

Spark plug (resistor

Bosch WSR 6 F,

type):

NGK BPMR 7 A

Electrode gap:

0.02 in. (0.5 mm)

Fuel System

All position diaphragm carburetor with integral fuel pump

Fuel tank capacity: 8.5 fl.oz (0.25 L)

Chain lubrication

Fully automatic, speed-controlled oil pump with rotary piston

Oil tank capacity: 4.9 fl.oz (0.50 L)

Weight

dry, without bar and chain

 

MS 170:

8.6 lbs.

 

(3.9 kg)

MS 180 C with quick chain

8.8 lbs

tensioner:

(4.0 kg)

MS 180 C with quick chain

 

adjuster and

9.3 lbs.

Easy2Start:

(4.2 kg)

Cutting Attachment (MS 170)

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 E guide bars

Reduced kickback STIHL guide bar (with green label)

Cutting lengths:

12,

14, 16 in. (30,

 

35,

40 cm)

Pitch:

3/8" P (9.32 mm)

Groove width:

0.043 in. (1.1 mm)

3/8" Picco chain

Low kickback STIHL saw chain (with green label)

Picco Micro Mini Comfort 3 (61 PMMC3)

Pitch:

3/8" P (9.32 mm)

Drive link gauge:

0.043 in. (1.1 mm)

MS 170, MS 170 C, MS 180, MS 180 C