WIRING INSTRUCTIONS
C
S
B
+
_
OS77R
BATTERY
SPECIFY
VOLTAGE
TO
STARTER
I
ST
B
RACK
PULLER
FUEL
VALVE
+
-
HOLD IN
PULL IN
WARRANTY
A two year limited warranty on materials and workmanship is provided with this Murphy product. Details are
available on request and are packed with each unit.
117
1
2
3
4
5
KEY SWITCH
C
S
B
+
_
OS77R
169 PH
MAGNETO
BATTERY
SPECIFY
VOLTAGE
4
5
3
2
1
OS77R USED WITH AN
ENERGIZED TO RUN
(ETR) SOLENOID
Note: For distributor
ignition applications,
you may use a Model
OS77R-I. Simply con-
nect terminal three (3)
to the negative side of
the ignition coil. You
will not need a mag-
netic pickup with the
Model OS77R-1.
OS77R USED TO SHUT
DOWN A MAGNETO
IGNITION ENGINE.
Note: Battery power
must be available. Also
note, a Murphy Model
169 PH magnetic
switch is used in place
of a Model 117.