Stihl MS 661 C-M Instruction Manual

0458-759-8221-C
42
English 13 Mixing Fuel and Refueling the Chain Saw
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 fuel tank opening with the
exterior positioning mark (1) lined up with the "unlocked"
symbol (2) on the fuel 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 "locked" symbol (3) on
the fuel 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.
► Also refer to the procedure below for returning the base of
the cap to the proper starting position for installation.
If the filler cap will not engage into the tank housing
The base of the filler cap is rotated in relation to the upper
part.
If the cap does not drop fully into the fuel tank opening when
the positioning marks (1, 2) line up, or if it does not tighten
properly when turned, the base of the cap may be
prematurely rotated in relation to the top. Such misalignment
can result from handling, cleaning or an improper attempt at
tightening.
– Illustrations A and B: The base of the cap is prematurely
rotated to the closed position and is not in the correct
starting position for installation. The tank will not seal in
this configuration. Note: in Illustrations A and B, the
interior positioning marks (1) are in line with the exterior
positioning marks (2).
– Illustration C: The bottom of the cap is in the correct
starting position for installation. Note: in Illustration C, the
interior positioning mark (1) is under the grip and not in
line with the outer positioning mark (2).
To return the base of the cap to the proper starting position
for installation:
2
3
1
0000-GXX-2935-A1
1
4
0000-GXX-2134-A1
1
2
A B C
1
2
1
2
0000-GXX-3136-A1
1
2
ABC

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