Checking The Cdi Unit - Yamaha 55DEHD Service Manual

Checking the CDI unit

NOTE:
Be sure to install the test propeller before
checking the peak voltage.
Test propeller: 90890-01620
1. Remove the cover.
2. Connect the digital circuit tester with
peak voltage adapter B to the ignition coil
lead and the ground.
3. Measure the CDI unit output peak volt-
age. If less than specification, measure
the charge coil output peak voltage.
Replace the CDI unit if the output peak
voltage of the charge coil is more than
specification.
B/W
B
B/W
B
B/W
B
6885J11
68880080
B
B/W
B/W B/W
1
B/W B/W 2
B/W B/W 3
B/W
68880010
Ignition and ignition control system
CDI unit output peak voltage:
z Black/white (B/W)–Ground (B)
x Black/white (B/W)–Ground (B)
c Black/white (B/W)–Ground (B)
r/min
Cranking
DC V 130
NOTE:
Remove the all spark plug caps, when mea-
suring the CDI unit peak voltage at loaded
engine cranking.
Loaded
1,500 3,500
150 150
8-6
1
2
3
4
5
6
7
8
9