1996 Johnson Evinrude "ED" 90 LV 125C, 130, 200, 225, 250 Service Manual, P/N 507128, Page 367Get this manual
RectifierRegulator Tests Variable Load Tests To test the operation of the rectifierregulator, you must be able to run the engine continuously at approximately 4500 RPM, such as 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 Method
INote The
rectifierregulator requires battery voltage from the purple lead to operateBefore proceeding, verify battery voltage at terminal strip purple leads when key in ON
1Disconnect battery cables
m 2Connect ared lead andammeter in series of the starter 0-40 amp between the the battery side rectifierregulator
solenoid.1
3Reconnect the engine's battery cables4Following the manufacturer's directions, connect the variable load tester (carbon pile) across the battery terminalsSteven's Instrument Model NoLB-85 and Snap-on Model NoMT540D are examples of testers available