Stihl MS 661 C-M, Instruction Manual

2

1

1

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a

► Loosen the nuts (1).

► Disengage the chain brake.

► Hold the bar nose up and turn the tensioning

screw (2) clockwise until the following points

apply:

–

Chain sag ‘a’ in the center of the bar is 1 - 2

mm.

–

The chain can still be pulled easily along the

bar with two fingers.

► Keep holding the bar nose up and tighten

down the nuts (1) firmly.

► If chain sag ‘a’ in the center of the bar is not 1

- 2 mm: Readjust chain tension.

6.3

Filling Up with Chain Oil

Chain oil lubricates and cools the rotating chain.

► Shut off the engine and engage the chain

brake.

► Place your saw on a level surface so that the

oil tank cap faces up.

► Use a damp cloth to clean the tank cap and

the area around it.

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► Swing the grip on the oil tank cap to the verti‐

cal position.

► Turn the oil tank cap counterclockwise as far

as stop.

► Remove the oil tank cap.

► Fill up with chain oil, taking care not to spill

any oil and do not overfill the tank.

► If the grip on the oil tank cap has dropped into

the closed position: Raise the grip until it is

vertical.

2

3

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1

► Place the cap in the filler opening so that mark

(1) lines up with mark (2).

► Press the cap down and rotate it clockwise as

far as stop.

The cap snaps into place. The mark (1) points

to mark (3),

► Check to see if the oil tank cap can be pulled

upwards and off.

► If the oil tank cap cannot be pulled upwards

and off: Fold down the grip on the oil tank cap.

The oil tank is closed.

If the oil tank cap can be pulled upwards and off,

perform the following steps:

► Place the oil tank cap in the filler opening – in

any position.

1

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2

► Press the cap down and rotate it clockwise as

far as stop.

► Press the cap down and rotate it counterclock‐

wise until mark (1) points to mark (2).

► Now try again to close the oil tank.

► If the oil tank still cannot be closed properly:

Do not use the chainsaw and contact a STIHL

dealer for assistance.

The chainsaw is not in a safe condition.

7

Engaging and Disengaging

the Chain Brake

7.1

Engaging the Chain Brake

The saw is equipped with a chain brake.
The chain brake is activated by the inertia of the

front hand guard if the kickback force is high

enough or can be engaged by the operator.

English

7 Engaging and Disengaging the Chain Brake

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0458-759-0121-D. VA0.A21.