Stihl MS 661 C-M Instruction Manual

0458-759-8221-C
34
English 10 Assembling the Chain Saw
10.1 Cutting Attachment
WARNING
If non-matching components are used, the cutting
attachment will be damaged beyond repair after a short
period of operation, and the chain could de-rail, resulting in
serious or fatal personal injury.
A cutting attachment consists of the chain, guide bar and
chain sprocket.
– The pitch (t) of the chain (1), chain sprocket and, if using
a Rollomatic guide bar, the nose sprocket must match.
– The drive link gauge (2) of the chain must match the
groove width of the guide bar (3).
10.2 Mounting and Removing the Guide Bar and
Chain
10.2.1 Mounting the Guide Bar and Chain
WARNING
The chain has many sharp cutters. If they contact your flesh,
they will cut you, even if the chain is not moving, @ 5.4.
Always wear heavy-duty work gloves when mounting or
otherwise handling the chain, @ 5.3.
To mount the guide bar and chain:
► Shut off the engine, @ 15.1.
► Unscrew the nuts (1).
► Remove the chain sprocket cover (2).
► Turn the side chain tensioner (3) counter-clockwise until
the tensioning gear (4) sits flush against the housing.
► Position the chain in the groove of the guide bar, starting
at the tip.
► Make sure that the cutters in the groove on the top side of
the guide bar face the tip of the bar. STIHL chains are
manufactured with arrows on the tie straps to help the
operator determine the proper direction of the chain.
Arrows on the tie straps on the top of the bar must point
toward the bar tip.
10 Assembling the Chain Saw
1
2
3
a
t = a 2
0000-GXX-1445-A0
1
4
3
2
0000-GXX-A371-A0
0000-GXX-2130-A0

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