120
SYSTEM ANALYSIS
IGNITION OUTPUT TESTS
Results:
No spark on one or more cylinders:
• Inspect or replace spark plugs
• Repeat static test on primary circuit.
Connect timing light pickup to the primary circuit
of the cylinder being tested. Activate test and
observe timing light strobe for consistent flash.
No spark control on one or more cylinders:
• Refer to Ignition Primary Circuit Resistance
Test on p. 121
• Refer to Ignition Coil Tests on p. 121.
Steady spark on all cylinders:
• Refer to Running Ignition Tests on p. 120 and
DYNAMIC TESTS on p. 114.
Running Ignition Tests
Use Evinrude Diagnostics software to monitor
system voltage (55 V) and ignition voltage
(200 V).
• Voltage readings at a specific speed (RPM)
should be steady.
• Refer to System Voltage Test on p. 118.
• Refer to Ignition Voltage Test on p. 119.
Use an inductive timing light to monitor the spark
signal through each of the secondary circuit
(spark plug lead) wires.
Start outboard and observe timing light strobe.
Look for a consistent flash and only one flash per
revolution. The strobe of the timing light should be
the same for each cylinder.
IMPORTANT: Test on primary circuit if strobe
from secondary circuit appears faulty.
Results:
Steady voltage and strobe, engine misfires:
• Inspect or replace spark plugs
• Refer to FUEL DELIVERY TESTS on p. 122.
• Check for internal engine damage.
Steady voltage, erratic strobe, engine misfires:
• Inspect or replace spark plugs
• Check CPS air gap and resistance.
• Refer to Ignition Primary Circuit Resistance
Test on p. 121.
• Refer to Ignition Coil Tests on p. 121.
Voltages fluctuate, engine misfires:
• Inspect battery and connections
• Test capacitor and all ground connections.
• Refer to System Voltage Test on p. 118
• Refer to Ignition Voltage Test on p. 119
• Refer to Ignition Primary Circuit Resistance
Test on p. 121.
• Refer to Ignition Coil Tests on p. 121.
IMPORTANT: If a running problem occurs at
about 1200 RPM, the outboard may be in S.A.F.E.
Refer to S.A.F.E. WARNING SYSTEM on p. 102.
1. Timing light pick-up
2. Ignition coil primary wire
005318
1
2
1. Timing light pick-up
2. Secondary, high tension wire
005319
1
2
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