1995 Johnson/Evinrude Outboards 50 thru 70 3-cylinder Service Manual, Page 256Get this manual
RectifierRegulator TestsAll Models Variable Load Tests To test the operation of the rectifierregulator, you must be able to run the engine continuously at approximately 4500 RPM, either in test tank, on marine dynamometer, or on the boatThe test consists of monitoring the system's response to partially discharged batteryTwo methods for performing this test are described belowVariable Load High Rate Discharge Tester The rectifierregulator requires battery voltage on the purpie lead to operateBefore proceeding, verify battery voltage at terminal strip purple leads when key is ON1Disconnect battery cables
L!J rectifierregulator red lead and the battery side of the starter
solenoid3Reconnect the engine's battery cables
r:;l 2Connect to 40 amp ammeter in series between the
rv 4Following the (carbon pile) across the battery terminalsmanufacturer's directions, connect the variable load tester