2008 Evinrude E-TEC 55MFE Technical Manual, Page 281Get this manual
TROUBLE CHECK CHART OUTBOARD WILL NOT SHUT OFF
OUTBOARD WILL NOT SHUT OFF
OBSERVATION
Outboard starts and runs, normal performance while running
POSSIBLE CAUSE
Stop circuit wiring
PROCEDURE
Check EMM LED indicatorsCheck wire harness (blackyellow) and stop switch(s)Check EMM LED indicators and eliminate stop circuit as possible causeStop wire (blackyellow) has 4.0 VDC from EMM with key on or outboard running
EMM failure