2008 Evinrude E-TEC 55MFE Technical Manual, Page 79Get this manual

2008 Evinrude E-TEC 55MFE Technical Manual, Page 79

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ENGINE MANAGEMENT MODULE (EMM) INTERNAL SENSORS
Monitors the EMM's 55 alternator circuitIf system voltage exceeds 57 volts, the EMM: Stores service code 18 EMM LED 1: ON (Running) Engine Monitor