Stihl MS 661 Instruction Manual

MS 661
English
31
NOTICE
Always slacken off the chain again after
finishing work. The chain contracts as it
cools down. If it is not slackened off, it
can damage the crankshaft and
bearings.
Short-term storage
Wait for engine to cool down. Keep the
machine with a full tank of fuel in a dry
place, well away from sources of
ignition, until you need it again.
Long-term storage
See "Storing the machine"
Varying cutting lengths, types of wood
and work techniques require varying
amounts of oil.
Standard setting
The oil flow can be adjusted as needed
using the adjusting screw (1) (on the
bottom of the machine).
Ematic position (E), medium oil flow –
N Turn adjusting screw to "E" (Ematic
position)
To increase oil flow –
N Turn the adjusting screw clockwise
– adjusting screw is limited by end
stop (2)
To reduce oil flow –
N turn the adjusting screw
counterclockwise
NOTICE
The saw chain must always be coated
with oil.
Setting for increased oil delivery rate
If necessary, the oil flow can be
increased beyond the standard setting.
N Press in end stop (2) using a
suitable tool – end stop is no longer
functional, the oil flow can be
increased further
If the end stop has been pressed in, it
remains in this position.
To increase oil flow –
N turn the adjusting screw clockwise
To reduce oil flow –
N turn the adjusting screw
counterclockwise
In adjustment range a, the oil tank may
run dry before the fuel tank, thus
resulting in the saw chain running dry.
N In adjustment range a, fill the fuel
tank only half full or refill the oil tank
when the fuel tank is approximately
half empty
NOTICE
If an increased oil flow is no longer
required, reset the adjusting screw to the
standard setting.
Oil Quantity Control
1
2
1166BA009 AM
1166BA010 AM
1166BA010 AM

Stihl MS 661 Specifications

General

Displacement	91.1 cc
Chain Pitch	3/8"
Engine Power	5.4 kW
Fuel Capacity	825 ml
Chain Oil Capacity	360 ml
Guide Bar Lengths	90 cm