Service Manual 5007215_Evinrude E-TEC 200-250 HP System Analysis [Ignition And Electrical Circuits]

Following is a complete list of circuits required for ignition output:

• Outboard running: black/yellow wire NOT grounded (emergency stop switch lanyard in place)

• Battery switched B+ input to power up EMM
• Battery B+ input to Start Assist Circuit (SAC) of EMM

• Provides EMM J2 connector with A/C voltage: Outboard cranking, typical range is 20-40 VAC (AC output voltage is related to cranking RPM); outboard running approximately 55 VAC.

• Start Assist Circuit (SAC) of EMM converts battery voltage (12 V) to 30 V for system circuit (55 V).
• Stator output to EMM provides voltage to EMM’s internal power supply.
• EMM digital ground, battery grounds, ignition grounds, and injector grounds must be functional.

• Provides EMM with input.
• Outboard cranking speed exceeds 75 RPM and a steady CPS signal is generated.

• System voltage from EMM (white/red) provides 55 VDC to the oil injection pump, the fuel injectors, and the ignition module of EMM.

• Connected to 55 V circuit (white/red) to stabilize current on 55 V circuit.
• Negative terminal of capacitor must be grounded.

• Output from EMM.
• EMM provides -200 VDC ± 10 V output to orange ignition primary wires during cranking.

Engine Monitor Screen, Ignition Voltage

IMPORTANT: Peak reading voltmeters must be set to “NEG” and “500” settings to measure ignition voltage.

• EMM provides input to primary winding of coil.
• Output from ignition coil secondary winding and high tension spark plug wire.