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SC - STARTER CONTACTOR
TB - TERMINAL BLOCK, 4 TA B
SP2 - SPARK PLUG, CYL. 2
SP1 - SPARK PLUG, CYL. 1
LED - ALARM INDICATOR
LOP - LOW OIL PRESSURE SWITCH
SCR - STARTER CONTACTOR RELAY
SM - STARTER MOTOR
SW1 - PRIME/START- RUN-OFF SWITCH
FS - FUEL SOLENOID
FP - FUEL PUMP
F1 - FUSE, 7.5A
CH - CHOKE HEATER
CS - CHOKE SOLENOID
IMS - IGNITION MODULE STUD
IM2 - IGNITION MODULE, CYL. 2
HTO - HIGH OIL TEMPERATURE SWITCH
IM1 - IGNITION MODULE, CYL. 1
GRD1 - CONTROL PANEL GROUND
GRD2 - UNIT GROUND STUD
BA - BRUSH ASSEMBLY
CB 1 / CB 2 - SEE CHART
LEGEND
= 12 VOLT S DC
= ALARM CONTROL (PCB)
= DC CONTROL VOLTAGE (PCB)
= SHUTDOWN CONTROL (PCB)
= GROUND
= GROUND CONTROL (PCB)
= FIELD BOOST
= VOLTAGE REGULATOR
DC OUTPUT
= AC VOLTAGE
IM1
IM2
SP1
SP2
12
J1
12345678109111314
PRINTED CIRCUIT BOARD
J2
CONTROL
ACTUATOR
GOVERNOR
SW1
START
PRIME
STOP
18
17
0
SCR
56
16
F1
0131656
FP
LOPHTO
BLK RED18A
086085
REGULATOR
VOLTAGE
2
2
0
6
22S
4
11S
6
0
4
22S
11S
LED
0712
CH
CS
0
90
14
RED
BLACK
SM
SC
BATTERY
+
-
12V
SC
0
0
16
160
13
POWER WINDINGS
11
BA
33
DPE WINDING
6240
44
CB2
CB1
FIELD
BLACKRED
18
17
0
56
712
0
18
11S
22S
13
16
0
17
REMOTE
PANEL
CONNECTOR
14
712
D
E
G
F
C
B
18
17
H
A
0
GREENWHITE
0
13
712
14
0
GREEN
WHITE
0
NEUTRAL CONNECTION
AC CONNECTION
CUSTOMER
BY CUSTOMER
18 15
17
71286 90
14 85 56 0
18A
4
15
11S
0
14
0 241
FS
14
712
22
44
44
22
22S 22
00
0
+
-
Section 5
ENGINE DC CONTROL SYSTEM
INTRODUCTION
The engine DC control system includes all com-
ponents necessary for the operation of the engine.
Operation includes rest, priming, cranking, starting,
running and shutdown. The system is shown sche-
matically.
OPERATIONAL ANALYSIS
CIRCUIT CONDITION – REST:
Battery voltage is available to the Printed Circuit Board (PCB)
from the vehicle BATTERY via the positive (RED) battery cable
to the isolated positive (RED) terminal stud, located in the control
panel. The power is supplied to Wire 13, a 7.5 amp FUSE (F1),
the STARTER CONTACTOR RELAY (SCR) and Wire 15/Pin 4 on
the PCB. However, PCB action is holding the circuits open, and no
action can occur.
Printed Circuit Board action (only) allows voltage to be supplied
to Wires 17 and 18 for start and stop actions on the START-STOP
SWITCH (SW1) and remote panel connector.
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