Stihl MS 661 C-M Installation, Operation & Maintenance Manual

MS 661 C-M
English
54
Rollomatic ES Light guide bars
Actual cutting length will be less than
listed bar length.
Saw chain 3/8"
Chain sprocket
To comply with the 45 degree computed
kickback angle requirement of Section
5.11 of ANSI/OPEI B175.1
-
2012, use
replacement saw chains listed above or
elsewhere by STIHL as conforming with
that requirement when used on this
model chain saw or use saw chains
classified as "low kickback" in
accordance with
ANSI/OPEI B175.1
-
2012.
Since new bar/chain combinations may
be developed after publication of this
Manual, ask your STIHL dealer for the
latest STIHL recommendations.
Please enter your saw model, serial
number as well as the part numbers of
the guide bar and saw chain in the
spaces provided. This will make re-
ordering simpler.
The guide bar and saw chain are subject
to normal wear and tear. When
purchasing these parts, always quote
the saw model, the part numbers and
names of the parts.
See "Specifications" in this manual for
the recommended reduced kickback
cutting attachments.
Reduced kickback STIHL guide bars
(with green label)
Bar lengths: 71, 80, 90 cm (28, 32,
36 in.)
Pitch: 3/8" (9.32 mm)
Groove width: 1.3 mm (0.050 in) or
1.6 mm (0.063 in.)
Sprocket nose: 11
-
tooth
Low kickback STIHL saw chain (with
green label)
Rapid Super 3 (33 RS3) Type 3624
Pitch: 3/8" (9.32 mm)
Drive link gauge: 1.3 mm (0.050 in)
Low kickback STIHL saw chain (with
green label)
Rapid Super 3 (33 RS3) Type 3626
Pitch: 3/8" (9.32 mm)
Drive link gauge: 1.6 mm (0.063 in)
7-tooth for 3/8" (rim sprocket)
Ordering Spare Parts
Model
Serial number
Guide bar part number
Chain part number

Stihl MS 661 C-M Specifications

General

Idle speed	- RPM
Motor type	2-stroke motor
Chain pitch	3/8 \
Blade length	800 mm
Product color	Black, Grey, Orange
Automatic oiling	Yes
Engine displacement	91.1 cm³
Power source	Gasoline
Sound power level	118 dB
Vibration emission	6.9 m/s²
Sound pressure level	105 dB

Weight and Dimensions

Weight	7400 g