Mercury 75 Service Manual

90-830234R3 DECEMBER 1997 ELECTRICAL - 2A-23
Ignition Coil Circuit
As the capacitor voltage flows through the primary
windings of the ignition coil, a voltage is induced into
the ignition coil secondary windings. This secondary
voltage rises to the level required to jump the spark
plug gap and return to ground. This secondary volt-
age can, if necessary, reach approximately 40,000
volts. To complete the secondary voltage path, the
released voltage enters the ground circuit of CDM
module.
N
BLK
N
S
S
S
S
S
S
N
N
N
N
N
S
GRN/WHT
WHT/GRN
YEL
YEL
BRN
BLK
WHT
+
+
+
_
_
_
WHT/GRN
PPL
BRN
BLK
BLK/YEL
BRN
BLK/YEL
BLK
BLK/YEL
2
3
PPL
a
b
c
d
e
f
g
h
i
j
1
Return Voltage
CAPACITOR-
Source Voltage
COIL-
SCR-
DIODE-
Trigger Voltage
a - Battery Charging Coils
b - Trigger Coils
c - Capacitor Charge Coils
d - CDM #1
e - CDM #2
f - CDM #3
g - Rev. Limiter (Not Used On All Models)
h - To Ignition Switch
i - Stop Switch
j - To Voltage Regulator

Mercury 75 Specifications

General

Horsepower	75 hp
Starting	Electric
Cylinders	3
Warranty	3 years
Shaft Length	20 in. or 25 in.