Electrical and Ignition
Ignition System
120
Ignition System
Use the Evinrude Diagnostics software to check
for fault codes before troubleshooting. Correct any
problems and clear the codes FIRST.
Required Systems
Following is a complete list of circuits required for
ignition output:
Stop Circuit
• Black/yellow wire NOT grounded (emergency
stop switch lanyard in place).
Battery
• Battery switched B+ input to power up EMM
• Battery B+ input to Start Assist Circuit (SAC) of
EMM
Stator Output Voltage
•
Provides A/C voltage to EMM J2 connector:
Outboard cranking, typical range is 20-40 VAC
(AC output voltage is related to cranking RPM
);
Outboard running approximately 55 VAC.
EMM
•
Controls ignition activation, injector activation,
and ignition timing.
• Start Assist Circuit (SAC) converts battery volt-
age (12 V) to 30 V for system circuit (55 V).
Crankshaft Position Sensor
• Provides EMM with input.
• Outboard cranking speed exceeds 75 RPM and
a steady CPS signal is generated.
Alternator Output/System Voltage
•
System voltage from EMM (white/red) provides
55 VDC to the oil pumps, fuel injectors, and the
ignition circuits of EMM.
Capacitor
•
Connected to 55 V circuit (white/red) to stabilize
current on 55 V circuit
• Negative terminal of capacitor must be
grounded.
Ignition Coil
• Primary circuits are powered by system (55 V)
voltage
• EMM provides control signal to ignition coil
• Output from ignition coil secondary winding and
high tension spark plug wire.
DANGER
The electrical system presents a serious
shock hazard. Allow outboard to sit for two
minutes after running before handling capaci-
tor or 55 V electrical components. Failure to
handle capacitor properly can result in
uncontrolled electrical discharge and possi-
ble electrical shock to humans. DO NOT han-
dle primary or secondary ignition
components while outboard is running or fly-
wheel is turning.
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