1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 294Get this manual
RectifierRegulator Tests Variable Load Tests To test the operation of the rectifier regulator, 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 cables2Connect to 40 amp ammeter in series between the rectifierlregulator red lead and the battery side of the starter solenoid3Reconnect the engine's battery cablesf81 4Following the manufacturer's directions, connect the variable load tester (carbon pile) across the battery terminalsSteven's Instrument Model No LB-85 and Snap-On Model NoMT540D are examples of testers available