Master Control; Construction And 32 Function - Stihl 064 Service Manual

STIHL 064, 066
8.

MASTER CONTROL

8.1 Construction and
Function
Positions of Master Control lever:
1 = STOP
2 = RUN
3 = START (warm start)
4 = CHOKE (cold start)
The main part of the Master Control is the
switch shaft with an integrally molded
multi-function operating lever and two
levers.
The switch shaft is located forward of the
rear handle in the tank housing and is
supported at three points.
The thumb-operated Master Control lever
moves the switch shaft to select the
required function.
The following positions can be selected
with the Master Control
lever (from bottom upward):
- STOP (short circuit contact
closed/ignition inter-
rupted)
- RUN (normal operating
position)
Top:
Cam serves as stop for Master
Control lever and accommodates
short circuit wire
Bottom:
Lever in center of switch shaft locks
throttle trigger in "Start" and "Choke"
positions
- CHOKE (cold start/choke
shutter closed)
- START (warm start/choke
shutter open)
The cam on the right holds the contact
sleeve of the short circuit wire and is also
the stop for locking the Master Control
lever in the "CHOKE" and "RUN"
positions.
Choke shutter closed by actuating
lever on switch shaft
The short circuit wire's contact sleeve
moves against the contact spring when
the Master Control is set to "STOP".
The molded lever in the center of the
switch shaft locks the throttle trigger in
the "START" and "CHOKE" positions.
An actuating lever is molded to the right-
hand end of the switch shaft. It closes the
choke shutter when the Master Control
lever is set to "CHOKE".
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