Johnson Evinrude Outboard Accessories by Year: 1972 to 2012 Find Johnson Evinrude Accessories. Select the year of your motor to shop by parts diagram for Johnson Evinrude Accessory parts. Evinrude and Johnson motors are often fitted with optional accessory parts on the engine, or they can be paired with external accessories: Beginners Guide With Diagrams - New Wire Marine Keep in mind that the longer your wiring run from the battery to switch panel is, the more voltage drop you’ll have (more about voltage drop). Prevent voltage drop by using larger cable. The power cables will be run to your New Wire Marine custom marine switch panel and your tinned marine negative bus bar.