Ignition Coil Circuit - Mercury 40 Service Manual

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.
CAPACITOR-
COIL-
SCR-
DIODE-
a - Battery Charging Coils
b - Trigger Coils
c - Capacitor Charge Coils
d - CDM #1
e - CDM #2
90-852572R1 JANUARY 1998
a
S
N
N
S
3
+
_
_ N S
1
+
+
2
_
N
S
N
S
j YEL
YEL
BLK
BRN
Return Voltage
Source Voltage
b
S
N
S
N
c
WHT/GRN
GRN/WHT
WHT
i
BLK/YEL
f - CDM #3
g - Rev. Limiter (Not Used On All Models)
h - To Ignition Switch
i - Stop Switch
j - To Voltage Regulator
d
e
f
PPL
g
BLK
h
ELECTRICAL - 2A-11