1997 Johnson Evinrude "EU" Electric Outboards Service Manual, P/N 507260, Page 30Get this manual
Introduction This section consists of three basic elements which will help you diagnose and locate problems in electric outboards Electrical Schematics for Each ModelWill show you component values and location and wiring layout Trouble Check Charts for Each ModelWill help you evaluate operational problems and identify damaged components Testing Procedures for Each ComponentOutlines correct methods for identifying damaged components
You can use anyone or all three of the elements to help you when troubleshooting an electric outboardNotel All soldered connections are protected by coating of
clear varnishThe varnish must be removed when making ohmmeter or continuity tests
INote Throughout this section, two symbols are used to interpret
troubleshooting results: This symbol indicates continuity or very low resistanceThis symbol indicates no continuity or very high resistance
Motor Speed TestAll Models
INote For
this test, leave the battery cables connected and submerge the motor in waterA propeller must be in place to properly load the motor1Connect to 50-amp ammeter between the electric outboard RED cable and battery positive (+) terminal2If equipped, move the 1224-volt switch to "24 V" position