Mercury 90 Service Manual

90-830234R3 DECEMBER 1997 ELECTRICAL - 2A-31
CAPACITOR DISCHARGE MODULE
IMPORTANT: Spark plug wires are screwed into CDM.
ABCD
a - Ground
b - Black/Yellow
c - Trigger Connection
d - Stator Connection
A resistance check is required and can be performed on the CDM as follows:
NOTE: This test can be performed using the test harness (P/N 84-825207A2). Do Not connect the test harness
plug to the stator/trigger engine wire harness.
CAPACITOR DISCHARGE MODULE
Circuit Test
Connect Negative
(–)
Meter Lead To:
Connect Positive
(+)
Meter Lead To:
Ohms
Scale
Results:
Stop Diode
Forward Bias
Green (D)/ or
Green test harness
lead
Black/Yellow (B)/ or
Black/Yellow test
harness lead
R x 100
Diode Reading*
Continuity
Stop Diode
Reverse Bias
Black/Yellow (B)/ or
Black/Yellow test
harness lead
Green (D)/ or
Green test harness
lead
R x 100
Diode Reading*
No Continuity
Return Ground
Path Diode,
Reverse Bias
Green (D)/ or
Green test harness
lead
Ground Pin (A) or
Black test harness
lead
R x 100
Diode Reading*
No Continuity
Return Ground
Path Diode,
Forward Bias
Ground Pin (A)/ or
Black test harness
lead
Green (D)/ or
Green test harness
lead
R x 100
Diode Reading*
Continuity
CDM Trigger Input
Resistance
Ground Pin (A)/ or
Black test harness
lead
White (C)/ or White
test harness lead
R x 100
1000 - 1250
Ohms
Coil Secondary
Impedance
Ground Pin (A) or
Black test harness
lead
Spark Plug
Terminal
(At Spark Plug
Boot)
R x 100 900 - 1200 Ohms
*Diode Readings: Due to the differences in test meters, results other than specified may be obtained. In such
a case, reverse meter leads and re-test. If test results then read as specified CDM is O.K. The diode measure-
ments above will be opposite if using a Fluke equivalent multimeter.

Mercury 90 Specifications

General

Brand	Mercury
Model	90
Category	Outboard Motor
Language	English