Removal; Ignition Coil Resistance Test - Mercury MerCruiser Service Manual

Waste Spark System

Removal

1. Disconnect the wire harness connectors at the ignition coil.
a
Coils
a - Ignition coil
b - Screws
c - Wiring harness connector
2. Remove the high‑tension coil lead.
3. Remove the coil mounting screws.
4. Remove the ignition coil.

Ignition Coil Resistance Test

1. Remove the spark plug lead from the ignition coil. Twist the ignition coil boot slightly while removing.
2. Use a DMT 2004 digital multimeter and perform the following test.
Ignition Coil Resistance Test (Ω)
Between coil towers
Between pin A and B
DMT 2004 Digital Multimeter
Page 4B-6
b b
c
c
a
b
42625
© 2016 Mercury Marine
a - Pin A
b - Pin B
c - Coil towers
91‑892647A01
59409
7200–8800
0.3–0.5
90-8M0099748 eng DECEMBER 2015