1992 Johnson/Evinrude EN 2.3 thru 8 outboards Service Manual, Page 260Get this manual
Running Test, Alternator Output Disconnect battery cables before proceeding with this check1Remove the rectifier red lead from the terminal board2Wire 0-40 amp ammeter in series with the rectifier red lead and the wiring harness red lead'" Guard against any red wire, its terminals, or the ammeter coming in contact with engine ground while the engine is runningContact could cause arcing3The engine's battery should not be fully charged when beginning this testConnect the battery cables and run the engine in test tankRefer to the output curves to determine the correct output-to-RPM ratio for your engine If there is no output or the output is not correct, refer to the stator and rectifier ohmmeter tests in this section