Description
The Engine Management Module (EMM) is a water-cooled engine controller . It controls many outboard systems including alternator output for the 12 V and 55 V circuit s. Operating voltage is supplied to the EMM by the stator.
This section discusses the functions of the EMM and its various internal and external sensors. It also de scribes using Evinrude Diagnostics software to retrieve and adjust service information saved in the EMM
The MFE 55 EMM includes programs, controlled by the fuel selector switch, that allow the engine to run on a several types of fuel. Refer to Fuel Selector Switch on p. 46.
EMM Functions
The EMM controls the following processes and functions:
Alternator output; 55 V and 12 V
Fuel and ignition timing and duration
Fuel injector activation
Oil injector pump activation
Electric fuel pump control
Idle speed control
RPM limiter
Electrical circuit monitoring
Service code creation and storage
Warning system activation
ROM verification, self-test
Choke-less cold starting
Output of diagnostic data
Tachometer signal
RPM profile and engine hours
Oiling ratios
Exhaust water valve activation
IMPORTANT: An Engine Monitor warning system is available f or MFE 55 models through the installation of boat harness wiring kits. Refer to Johnson/Evinrude Genuine Parts catalog.
EMM Connections
IMPORTANT: EMM connections and wiring must be clean and tight. Improper electrical connections can damage the EMM. DO NOT run the outboard with loose or disconnected wiring.
Make sure EMM connections are clean and tight.
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- J1-A connector
- J1-B connector
- J2 connector
LED Indicators
The EMM has four LED indicators located next to the electrical connectors that provide useful information about the status of the system.
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- LED indicators (Cooling hose removed for clarity)
As the outboard is being started, all four LEDs should light and then go off in sequence. If any of the LEDs does NOT light during starting, refer to EMM LED INDICATORS on p. 99.
When the outboard is running, all LEDs should be off. If any LED is lighted while the outboard is running, refer to EMM LED INDICATORS on p. 99.
