EVINRUDE JOHNSON Outboard Wiring Diagrams MASTERTECH MARINE
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View parts diagrams and shop online for STARTER MOTOR AND WIRING HARNESS parts, 1978 Outboard 80 [EL] 1080528. Offering discount prices on OEM parts for over 50 years. FAST $4.95 shipping available.. Understanding and reading a wiring diagram is a key part of servicing and maintaining your Mercury 115 outboard motor. Knowing how to use a wiring diagram helps you identify problems more quickly, saving time and money in the long run.
Get the downloadable PDF service manual for 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989 3, 4 and 6 cylinder, 2-stroke Mercury outboard motors listed above.. The Mercury outboard boat harness (external) is at bottom of this chart. That is the harness that goes from the engine to the control box by the steering wheel.
![[DIAGRAM] 1978 Mercury Outboard Control Box Wiring Diagram MYDIAGRAM](https://schematron.org/image/mercury-881170a15-side-mount-control-box-wiring-diagram-2.jpg "[DIAGRAM] 1978 Mercury Outboard Control Box Wiring Diagram MYDIAGRAM")
![[DIAGRAM] 1978 Mercury 500 Wiring Schematic Diagram](http://www.oldcarmanualproject.com/tOCMP/wiring/5765wiring diagrams/Mercury/MWire5765-269.jpg "[DIAGRAM] 1978 Mercury 500 Wiring Schematic Diagram")
![[DIAGRAM] 1978 Mercury Outboard Control Box Wiring Diagram MYDIAGRAM](https://www.marineengine.com/parts/evinrude-johnson-parts-diagrams/JOHNSON/51665.gif "[DIAGRAM] 1978 Mercury Outboard Control Box Wiring Diagram MYDIAGRAM")
![[DIAGRAM] 1978 Mercury 500 Wiring Schematic Diagram](https://i.pinimg.com/originals/4e/59/4b/4e594be3d1c30058ab7a7be36f639134.jpg "[DIAGRAM] 1978 Mercury 500 Wiring Schematic Diagram")
![[DIAGRAM] 1978 Mercury Outboard Control Box Wiring Diagram MYDIAGRAM](http://schematron.org/image/mercury-881170a15-side-mount-control-box-wiring-diagram-7.png "[DIAGRAM] 1978 Mercury Outboard Control Box Wiring Diagram MYDIAGRAM")
![[DIAGRAM] 1978 Mercury Outboard Control Box Wiring Diagram MYDIAGRAM](https://www.marineengine.com/parts/mercury_marine_parts/static/img/MERMAR/84517/10.gif "[DIAGRAM] 1978 Mercury Outboard Control Box Wiring Diagram MYDIAGRAM")
