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

MS 661 C-M
English
52
Definitions
1 Filter Cover Twist Lock
Lock for filter cover.
2 Spark Plug Boot
Connects the spark plug with the
ignition lead.
3 Handle Heating Switch (Depending
on Model)
For switching the electric handle
heating on and off.
4Chain Brake
A device to stop the rotation of the
chain. Is activated in a kickback
situation by the operator's hand or
by inertia.
5 Chain Sprocket
The toothed wheel that drives the
saw chain.
6 Chain Sprocket Cover
Covers the sprocket.
7 Chain Catcher
Helps to reduce the risk of operator
contact by a chain when it breaks or
comes off the bar.
8Bumper Spike
Toothed stop for holding saw steady
against wood.
9 Chain Tensioner
Permits precise adjustment of chain
tension.
10 Guide Bar
Supports and guides the saw chain.
11 Oilomatic Saw Chain
A loop consisting of cutters, tie
straps and drive links.
12 Oil Filler Cap
For closing the oil tank.
13 Muffler (with Spark Arresting
Screen)
Muffler reduces engine exhaust
noise and diverts exhaust gases
away from operator.
Spark arresting screen is designed
to reduce the risk of fire.
14 Front Hand Guard
Provides protection against
projecting branches and helps
prevent left hand from touching the
chain if it slips off the handlebar. It
also serves as the lever for chain
brake activation.
15 Front Handle (Handlebar)
Handlebar for the left hand at the
front of the saw.
16 Decompression Valve –
(Automatically Resetting)
Releases compression pressure to
make starting easier – when
activated.
17 Starter Grip
The grip of the pull starter, for
starting the engine.
18 Fuel Filler Cap
For closing the fuel tank.
19 Master Control Lever
Lever for starting, operating and
stop-engine positions.
20 Throttle Trigger
Controls the speed of the engine.
21 Throttle Trigger Lockout
Must be depressed before the
throttle trigger can be activated.
22 Rear Handle
The support handle for the right
hand, located at the rear of the saw.
23 Rear Hand Guard
Gives added protection to
operator's right hand.
Guide Bar Nose
The exposed end of the guide bar.
(not illustrated, see chapter
"Tensioning the Saw Chain")
Clutch
Couples engine to chain sprocket
when engine is accelerated beyond
idle speed. (not illustrated)
Anti-Vibration System
The anti-vibration system includes a
number of anti-vibration elements
designed to reduce the
transmission of vibrations created
by the engine and cutting
attachment to the operator's hands.
(not illustrated)

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