Stihl 66

At very low outside temperatures:
Allow engine to warm up
As soon as the engine runs:
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Blip the throttle trigger to disengage
it from starting throttle position -
Master Control lever will move
to normal operating position -
engine settles down to idle speed.
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Disengage chain brake:
Pull hand guard toward front handle -
as shown in illustration -
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Open throttle slightly -
warm up engine for short period.
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Change over to winter operation
if necessary -
see section "Winter Operation".
If engine doesn’t start:
If you did not move the Master Control
lever to "Warm Start" n quickly enough
after the engine began to fire, the
combustion chamber has flooded.
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Turn the knob above the rear
handle counterclockwise -
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Pull off the spark plug boot.
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Unscrew and dry off the spark plug.-
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Set the Master Control lever to d
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Press down the throttle trigger
interlock, open the throttle fully and,
at the same time, crank the engine
several times with the starter to
clear the combustion chamber.
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Refit the spark plug and connect
the spark plug boot -
reassemble all other parts
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Set Master Control lever
to "Warm Start"=n
even if engine is cold.
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Press in decompression valve
again.
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Now start the engine.
Fuel tank run until dry and then
refueled
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Press in decompression valve
again.
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Pull starter rope several times until
fuel line is primed.
Different quantities of oil are required for
different bar lengths, types of wood and
cutting techniques.
Use the adjusting screw (1) to vary the
oil feed rate as required.
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Most economic setting -
turn adjusting screw to "E"
(Ematic position).
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To increase oil feed -
turn adjusting screw clockwise.
To reduce oil feed -
turn adjusting screw counterclockwise.
137BA008 KN
Oil Quantity
Control
1
137BA010 KN
066 33