116
SYSTEM ANALYSIS
IGNITION OUTPUT
System Voltage
The ignition module of the
EMM
is powered by
input voltage on pins 3 and 4 of
EMM
J1-B con-
nector.
Use the engine
Monitor
screen of the
Evinrude
Diagnostics Software program to check system
voltage.
Results:
•
“KEY ON” - Approximately 1 V less than battery
voltage, system voltage is GOOD.
•
“KEY ON” - NO voltage, check 12 V power to
EMM.
Repair connection or wiring.
•
“RUNNING” - 55 V ± 2, system voltage is GOOD.
•
“RUNNING” - less than 55 V ± 2, check stator
output to
EMM
. Repair connection or wiring.
Possible faulty stator or
EMM.
Refer to
Stator
Tests
on p. 129.
IMPORTANT:
EMM
must be ON for voltage to
be present on the 55 V alternator output circuit.
This output supplies all 55 V circuits on the
engine, including the ignition module of the
EMM
.Power is normally supplied to the
EMM
when the key switch is ON. Switched B+ (12 V) is
supplied to the engine wire harness. Voltage
enters the
EMM
at pin 10 (purple) of the
EMM
J1-
B connector.
Static Spark Test
Perform the static spark test using the
Evinrude
Diagnostics Software program and a timing light.
IMPORTANT:
DO NOT use a spark checker tool
with
E-TEC
models. Radio Frequency Interfer-
ence (RFI) generated by the arcing current can
cause erratic behavior in the
EMM
.
The outboard must NOT be running and the emer-
gency stop switch lanyard must be installed.
Connect timing light pickup to primary and then
secondary circuit of the ignition circuit being acti-
vated. Activate one circuit at a time and observe
timing light strobe for consistent flash.
Engine Monitor Screen, System Voltage
006307
Static Tests Screen
005166
1.
Timing light pick-up
2.
Ignition coil primary wire (orange)
005080
2
1
Summary of Contents for E-tec 75 HP
Page 1: ......
Page 233: ...233 POWERHEAD POWERHEAD VIEWS 10 POWERHEAD VIEWS Port Short Block Starboard Short Block ...
Page 234: ...234 POWERHEAD POWERHEAD VIEWS Port Dressed Powerhead Starboard Dressed Powerhead ...
Page 235: ...235 POWERHEAD POWERHEAD VIEWS 10 Front ...
Page 236: ...236 POWERHEAD POWERHEAD VIEWS Rear ...
Page 237: ...237 POWERHEAD POWERHEAD VIEWS 10 Top ...
Page 298: ...S 2 ...
Page 344: ......