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FIGURE 21 – Wiring Diagram-18H & 20H (Engine Mounted Fuel Tank & Wire Harness wo/ Strip)
R
E
D
G
R
E
E
N
G
R
E
E
N
Y
E
L
L
O
W
START
SOLENOID
ON
ENGINE
BLACK
BLACK
TRANSISTORIZED
IGNITION UNIT
FUEL CUT
SOLENOID
BLACK
BLACK
ENGINE
STOP DIODE
TRANSISTORIZED
IGNITION UNIT
ENGINE OIL
PRESSURE
SWITCH
WHITE w/ BLUE STRIP
WHITE/BLUE STRIP
BLACK
BLACK
WHITE
WHITE
GREY
GREY
GREY
GREY
GREY
GREY
SPARK
PLUG
SPARK
PLUG
CUT AND
TAPE OVER
HONDA
WIRE HARNESS
20 AMP CHARGE COILS
20 AMP REGULATOR / RECTIFIER
MOUNTED AT INSIDE OF RIGHT
HAND SHIELD
STARTER MOTOR
G
R
E
E
N
P
U
R
P
L
E
Y
E
L
L
O
W
RED
DS
O
B
C
KEY
SWITCH
B
L
ACK
B
L
A
C
K
BATTERY
WIRE HARNESS
B
L
A
C
K
w
/
R
E
D
S
T
R
I
P
E
B
L
A
C
K
w
/
Y
E
L
L
O
W
S
T
R
I
P
E
23
P
U
R
P
L
E
WHITE
1 177283 1 Honda Wiring Harness
2 163779 1 Gauge, Hour Meter
3 163830 1 Keyswitch (Wisconsin # YC78D)
4 166830 1 Switch, Toggle - Water Pump
5 177016 1 Water Pump
6 ------- 1 Fuse, 10A
7 177063 1 Battery Cable, (+) Positive, Red
8 139255 1 Battery 12V Lead-Acid
9 167891 1 Battery Cable, (-) Negative, Black
10 164370 1 Connector, Male Push-On
11 177285 1 Wire Ass'y, Hour Meter, Ground
12 177286 1 Wire Ass'y, Hour Meter, Positive
13 ------- 1 Motor, Starter
14 ------- 1 Switch, Engine Oil Pressure
(Honda #37240-ZG3-E01)
15 ------- 1 Fuel Solenoid Shut Down
16 ------- 1 Transistorized Ignition Unit
17 ------- 1 Engine Stop Diode
18 ------- 1 Spark Plug
19 ------- 1 Charging Coil, 20A
(Honda #31620-ZJ1-801)
20 ------- 1 Engine Wire Harness
21 ------- 1 Rectifier-Regulator, 20A
(Honda #31620-ZG5-003)
22 167869 1 Wiring Harness, Water Pump
23 177288 1 Terminal 5/16 Ring 16 Ga
DIAGPART QTY
LOC NO. REQ DESCRIPTION
W
i
r
i
ng D
i
agram 18 & 20 HP Hon
d
a