Oil Quantity Control - Stihl MS 661 C-M Instruction Manual

Chain at operating temperature
The chain stretches and begins to sag.
The drive links must not come out of the
bar groove on the underside of the bar –
the chain may otherwise jump off the
bar. Retension the chain – see
"Tensioning the Saw Chain".
NOTICE
The chain contracts as it cools down. If it
is not slackened off, it can damage the
crankshaft and bearings.
After a long period of full-throttle
operation
After a long period of full-throttle
operation, allow engine to run for a while
at idle speed so that the heat in the
engine can be dissipated by flow of
cooling air. This protects engine-
mounted components (ignition,
carburetor) from thermal overload.
After finishing work
Slacken off the chain if you have
N
retensioned it at operating
temperature during work.
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.
MS 661 C-M
Long-term storage
See "Storing the machine"

Oil Quantity Control

Varying cutting lengths, types of wood
and work techniques require varying
amounts of oil.
Standard setting
1
2
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 –
Turn adjusting screw to "E" (Ematic
N
position)
To increase oil flow –
Turn the adjusting screw clockwise
N
– adjusting screw is limited by end
stop (2)
To reduce oil flow –
turn the adjusting screw
N
counterclockwise
NOTICE
The saw chain must always be coated
with oil.
English
39