Checking Breaker; Controlled Ignition - Stihl 009 User Manual

STIHL 009, 010, 011
4.5.1

Checking Breaker

Controlled Ignition

Top:
Dial gauge with holder 1110 890 8600 and
tracer pin 1107 894 3000
Bottom:
Holder in position
To check ignition timing, remove the
fan housing and spark plug. Screw
the holder into the spark plug hole
and then insert the dial gauge, with
tracer pin extension, in the holder.
Turn the flywheel to bring the piston
to T D.C. and then set the dial gauge
pointer to "0" in this position. Attach
terminal clips of ignition timing unit
securely to cylinder fin and contact
spring. Now turn flywheel backward
about a quarter of a revolution.Switch
Top:
Dial gauge set to "O"
Bottom:
Ignition timing unit ready for test Timing marks on flywheel and crankcase
on ignition timing unit and turn fly-
wheel slowly in the engine's normal
direction of rotation until the indicator
lamp on the timing unit lights up, or
the buzzer sounds.
The contact breaker opens in this
position. The dial gauge should now
show a reading of 2.0 mm. If this is
not the case, the ignition must be
retimed.
On machines with a timing mark on
the flywheel, ignition timing is
checked by bringing the flywheel and
crankcase timing marks into align-
ment. The indicator lamp on the
timing unit should just begin to glow
in this position.
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