Cdm (P/N 827509); Spark Gap Tester P/N 91-850439; Cdm Test Harness 84-825207A2 - Mercury 75 Service Manual

CDM (P/N 827509) Trouble Shooting Flowchart
Chart 1
Step Action
1 Verify High Tension Leads, Spark
Plug and Spark Boots are in good
condition. Inspect wires for chafing.
Visual Inspection
2 Verify 4 Pin Connector Integrity
Visual Inspection
3 Verify Ground from CDM connector
to block
4 Test all CDMs at Cranking with
Spark Gap Tester
Spark on All CDMs?
Will spark jump a 7/16 in.
(11.11 mm) gap?

CDM (P/N 827509)

a - Ground
b - Black/Yellow
c - Trigger Connection
d - Stator Connection

Spark Gap Tester P/N 91-850439

90-830234R3 DECEMBER 1997
Value Yes
– Step 2
– Step 3
0.2 Ohms Step 4
and below
7/16 in. If at least
(11.11 mm) one CDM
gap has spark,
continue with
Chart #3

CDM Test Harness 84-825207A2

55117
No
Replace High Tension
Failed Com- lead pin
ponent P/N
84-813706A56
Step 2
Repair/Re-
place Con-
nector Com-
ponents
Step 3
Correct DVA/Multimeter
Ground Path P/N 91-99750
Test Harness
Step 4
P/N
84-825207A2
Continue Spark Gap Tes-
with Chart #2 ter
P/N 91-850439
A B C D
ELECTRICAL - 2A-27
Tools
–