Rev Limiter Circuit - Mercury 40 Service Manual

Rev Limiter Circuit

The rev limiter is activated through the purple wire
when the key switch is rotated to the "on" position.
The rev limiter uses a trigger signal (brown wire) to
determine engine speed or rpm. If the engine speed
exceeds the specified rpm, the rev limiter will ground
out the CDM capacitor charge. The capacitor voltage
flows through the black/yellow wires into the rev limit-
er and to engine ground through the black wire.
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
Trigger 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-13