Ignition Output Tests; Required Ignition Systems; Wiring Inspection - BRP E250DHLSCS Service Manual

IGNITION OUTPUT
TESTS
DANGER
The electrical system presents a serious
shock hazard. Allow outboard to sit for
two minutes after running before handling
capacitor or 55 V electrical components.
Failure to handle capacitor properly can
result in uncontrolled electrical discharge
and possible electrical shock to humans.
DO NOT handle primary or secondary igni-
tion components while outboard is run-
ning or flywheel is turning.
Check the Evinrude Diagnostics Software pro-
gram Stored Faults screen for current service
codes before troubleshooting. Correct any prob-
lems and clear the codes FIRST.

Required Ignition 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 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.
EMM
Controls digital grounds, battery grounds, 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
•
and a steady CPS signal is generated.
Alternator Output/System Voltage
System voltage from EMM (white/red) provides
•
55 VDC to the oil injection pump, the fuel injec-
tors, and the ignition module of EMM.
Capacitor
Connected to 55 V circuit (white/red) to stabilize
•
current on 55 V circuit
Negative terminal
•
grounded.
Ignition Primary Voltage
Output from EMM
•
EMM provides 200 VDC ± 10 V output to
•
orange ignition primary wires.
Ignition Coil
EMM provides input to primary winding of coil
•
Output from ignition coil secondary winding and
•
high tension spark plug wire.

Wiring Inspection

Visually inspect all wiring, connections, and
grounds.
Use an ohmmeter to test resistance on all ground
circuits and connections. Ohmmeter readings
should be approximately 0.0 Ω.
Check that all engine wire harness grounds have
continuity to the cylinder/crankcase.
;
)
1. Main engine harness ground
Clean or repair all ground circuits, wiring, and con-
nections as needed.
SYSTEM ANALYSIS

IGNITION OUTPUT TESTS

300 75
of capacitor must
RPM
be
6
1
004128
115