87
System Analysis
Ignition Output Tests
5
Use the Evinrude Diagnostics software Monitor
screen to check system voltage.
Results:
• EMM ON (not running) - approximately 1 V less
than battery voltage, system voltage is GOOD.
• EMM ON (not running) - no voltage, check 12 V
power to EMM. Repair connection or wiring.
• RUNNING - 55 V ± 2, system voltage is GOOD.
• RUNNING - less than 55 V ± 2, check stator
output to EMM. Repair connection or wiring.
Possible faulty stator or EMM. Refer to Stator
Tests on p. 103.
IMPORTANT: The EMM must be ON for voltage
to be present on the system voltage (55 V) circuit.
Power is normally supplied to the EMM when the
key switch is turned ON. The EMM is also turned
ON when it begins to receive AC voltage from the
stator while the outboard is being cranked. On a
non-running rope start engine, power is supplied to
the EMM by Diagnostic Power Supply Tool,
P/N 587005.
Static Ignition Test
Perform the static ignition test using Evinrude
Diagnostics software and an inductive timing light.
IMPORTANT: DO NOT perform static tests us-
ing Diagnostic Power Supply Tool, P/N 587005,
with internal 9 volt batteries only. This will produce
false results. Refer to Communication on p. 69.
IMPORTANT: DO NOT use a spark checker tool.
Radio Frequency Interference (RFI) generated by
the arcing current can cause erratic EMM opera-
tion.
The outboard must NOT be running and the emer-
gency stop switch lanyard must be installed.
Connect timing light pickup to the secondary cir-
cuit (spark plug lead) of the cylinder being tested.
Activate test and observe timing light strobe for
consistent flash.
IMPORTANT: This test is operating the ignition
coil with 12 V battery power on the system voltage
(55 V) circuit. An inductive probe with low sensitiv-
ity may not be able to detect the signal.
Results:
No spark on one or more cylinders:
• Inspect or replace spark plugs
• Refer to Ignition Control Circuit Tests on
p. 88
• Refer to Ignition Coil Tests on p. 89
Monitor Screen, System voltage
008566A
Static Tests Screen
008569A
1. Timing light pick-up
2. Spark plug lead
006492
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