4
E
WIRING DIAGRAMS
SERVICE MANUAL NUMBER 23
90-861326--1   MARCH 1999 Page 4E-1
ELECTRICAL SYSTEM
Section 4E - Wiring Diagrams
Table of Contents
Wiring Colors for MerCruiser 4E-2. . . . . . . . . . 
Starting and Charging System Wiring 
  Harness Diagrams 4E-4. . . . . . . . . . . . . . . . . 
MCM 454 / 502 MPI 4E-4. . . . . . . . . . . . . . . 
MCM 7.4L MPI 4E-6. . . . . . . . . . . . . . . . . . . 
MIE 454 MPI Horizon & 8.2L MPI 4E-8. . . 
MIE 7.4L MPI 4E-10. . . . . . . . . . . . . . . . . . . . 
Fuel Injection Wiring Harness 
  Diagrams 4E-12. . . . . . . . . . . . . . . . . . . . . . . . . 
MEFI 1 MCM 454 / 502 Mag MPI and 
  MIE 454 Mag MPI Horizon and 
  8.2L MPI Models 4E-12. . . . . . . . . . . . . . . . 
MEFI 2 MCM 7.4L MPI (L-29) Model 4E-14
MEFI 2 MIE 7.4L MPI Model 4E-15. . . . . . . 
MEFI 3 MCM 454 / 502 Mag MPI and
  MIE 454 Mag MPI Horizon and 
  8.2L MPI Models 4E-16. . . . . . . . . . . . . . . . 
MEFI 3 MCM 7.4L MPI Bravo and 
  MIE 7.4L Inboard 4E-17. . . . . . . . . . . . . . . . 
Instrumentation Harness Diagrams 4E-18. . . . 
MCM (Sterndrive) 4E-18. . . . . . . . . . . . . . . . . 
MIE (Inboard) 4E-19. . . . . . . . . . . . . . . . . . . . 
Dual Station Wiring (Using a Neutral Safety
Switch in Only One Remote Control) 4E-20
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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