Stihl MS 661 C-M Instruction Manual

0458-759-8221-C
37
English 11 Lubricating the Saw Chain and Guide Bar
► Flip up the grip and press the cap down firmly (1).
► Turn the cap slowly counter-clockwise (2) to the open
position (3). In the open position, the exterior positioning
mark (4) on the cap will line up with the symbol (5) on the
chain oil tank housing
► Remove the cap and fill the tank with bar and chain oil.
► Take care not to spill bar and chain oil while refilling the
tank.
► Do not overfill the tank. Leave approximately 0.5 in.
(13 mm) of air space.
Closing
To close the tank:
► Raise the grip on the top of the cap until it is upright at a
90° angle. Insert the cap in the chain oil tank opening with
the exterior positioning mark (1) lined up with the open
symbol (2) on the chain oil tank housing.
► Using the grip, press the cap down firmly while turning it
clockwise to the closed position (approximately 1/4 turn).
In the closed position, the interior (4) and exterior (1)
positioning marks will align with the closed symbol (3) on
the chain oil tank housing.
► Fold the grip flush with the top of the cap and check for
tightness.
► If the grip does not lie completely flush with the cap or the
detent on the grip does not fit in the corresponding recess
in the tank opening, or if the cap is loose, the cap is not
properly seated and you must repeat the above steps.
11.3 Adjusting the Flow of Bar and Chain Oil
WARNING
Never operate your saw without bar and chain lubrication. If
the chain runs dry, the cutting attachment will be damaged
beyond repair within a very short time. A damaged chain
may break, resulting in severe or fatal personal injury.
Always check chain lubrication and the oil level in the tank
before starting work and periodically during work.
This chain saw is equipped with an adjustable oil pump. The
flow of bar and chain oil can be set for different guide bar
lengths, types of wood and working techniques.
To adjust the flow of bar and chain oil:
► Shut off the engine, @ 15.
► Engage the chain brake, @ 12.1.
0000-GXX-2930-A1
123
4
5
2
3
1
0000-GXX-2931-A1
1
4
0000-GXX-3165-A0
A
12

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