2007 Evinrude E-Tec 75, 90 HP outboards Service Manual, Page 115Get this manual
SYSTEM ANALYSIS IGNITION OUTPUT
IGNITION OUTPUT
The electrical system presents serious shock hazardAllow outboard to sit for two minutes after running before handling capacitor or 55 electrical componentsFailure to handle capacitor properly can result in uncontrolled electrical discharge and possible electrical shock to humansDO NOT handle primary or secondary ignition components while outboard is running or flywheel is turning
Ignition Voltage
Use the Evinrude Diagnostics Software program to check ignition voltage to the primary ignition circuit(s)Check the EMM's ignition voltage to the primary circuits of the ignition coils on the engine Monitor screen
Wiring Inspection
Visually inspect all wiring, connections, and groundsUse an ohmmeter to perform resistance tests on all ground circuits and connectionsOhmmeter readings should be approximately 0.0 Check that main engine wire harness ground stud has continuity to the cylindercrankcaseEngine Monitor Screen, Ignition Voltage 006307