Evinrude E-tec 75 HP - Fuel Delivery Tests

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SYSTEM ANALYSIS
IGNITION OUTPUT TESTS
Running Ignition Tests
Use Evinrude Diagnostics Software to monitor
system voltage (55 V).
• Voltage readings at a specific spe ed (RPM)
should be steady
• Refer to System Voltage Test on p. 80.
Use an inductive timing ligh t to monito r the sp ark
signal through each of the secon dary circu it
(spark plug lead) wires.
Start outb oard a nd observe timing light stro be.
Look for a consistent flash and only one flash per
revolution. The strobe of the timing light should be
the same for each cylinder.
Results:
Steady voltage and strobe, engine misfires:
• Inspect or replace spark plugs
• Refer to FUEL DELIVERY TESTS on p. 84
• 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 Control Circuit Tests on
p. 83
• Refer to Ignition Coil Tests on p. 83.
Voltages fluctuate, engine misfires:
• Inspect battery and connections
• Test capacitor and all ground connections.
• Refer to System Voltage Test on p. 80
• Refer to Ignition Control Circuit Tests on
p. 83
• Refer to Ignition Coil Tests on p. 83.
IMPORTANT: If a running pro blem occurs at
about 1200 RPM, the outboard may be in S.A.F.E.
Refer to S.A.F.E. WARNING SYSTEM on p. 62.
1. Timing light pick-up
2. Spark plug lead
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