STIHL MS 660 MAGNUM manual Specifications

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

Engine

STIHL single cylinder two-stroke engine

MS 660
Displacement:	5.6 cu. in.
	(91.6 cm3)
Bore:	2.13 in. (54 mm)
Stroke:	1.57 in. (40 mm)

Engine power to ISO 7.0 hp (5.2 kW)

7293:	bei 9,500 rpm
Idle speed:	2,500 rpm
High speed setting
when performing
repairs (with bar and
chain):	13,500 rpm

Ignition System

Electronic (breakerless) magneto ignition

MS 660

Spark plug (resistor	NGK BPMR 7 A,
type):	Bosch WSR 6 F
Electrode gap:	0.02 in (0.5 mm)
Fuel System

All position diaphragm carburetor with integral fuel pump

Fuel tank capacity: 27.9 fl.oz (0.825 l)

Chain Lubrication

Fully automatic, speed-controlled oil pump with rotary piston. Additional manual oil flow control

Oil tank capacity: 12.2 fl.oz (0.36 l)

Weight

dry, without bar and chain

MS 660:	16.5 lbs. (7.5 kg)
MS 660 with wrap-
around handle:	16.8 lbs. (7.6 kg)
Cutting Attachment

Recommended cutting attachments complying with Section 5.11 of ANSI/OPEI B 175.1-2012

Observe notes on ANSI/OPEI B

175.1-2012 and definition of "low kickback chain" in chapter on "Safety Precautions and Working Techniques".

English

Rollomatic E guide bars

Reduced kickback STIHL guide bar (with green label)

Cutting lengths:	20, 25, 28, 32 or
	36 in (50, 63, 70, 80
	or 90 cm)
Pitch:	3/8" (9.32 mm)
Groove width:	0.050 in (1.3 mm)
Nose sprocket:	10-tooth

Reduced kickback STIHL guide bar (with green label)

Cutting lengths:	20, 22, 25, 28, 32 or
	36 in (50, 55, 63, 70,
	80 or 90 cm)
Pitch:	3/8" (9.32 mm)
Groove width:	0.063 in (1.6 mm)
Nose sprocket:	10-tooth

3/8" chains

Low kickback STIHL saw chain (with green label)

Rapid Super 3 (33 RS3) Type 3624

Pitch:	3/8" (9.32 mm)
Drive link gauge:	0.050 in (1.3 mm)

Low kickback STIHL saw chain (with green label)

Rapid Super 3 (36 RS3) Type 3626

Pitch:	3/8" (9.32 mm)
Drive link gauge:	0.063 in (1.6 mm)

Chain sprocket

7-tooth for 3/8" (rim 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

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