1991 Johnson Evinrude EI 60 Loop V Models 150, 175 outboards Service Manual, Page 237Get this manual
charge Method tery voltageroltage is greater than 12.5 volts, go to Step 2v'oltage is less than 12.5 volts, go to Step 32Twist the spark plug leads and remove them from the spark plugsCrank the engine in short bursts until battery voltage is less than 12.5 voltsCheck battery voltage with key OFF3Disconnect the battery cables4Connect 0-40 amp ammeter in series between the rectifier regulator red lead and the battery side of the starter solenoid5Reconnect the battery cables and the spark plug leadsThe rectifierregulator requires battery voltage from the purple lead to operateBefore proceeding, separate the rectifierregulator purple lead bullet connectorVerify battery voltage at the engine harness connector when key is ONReconnect the purple lead bullet connector6Start the engine and run it at approximately 4500 RPMThe ammeter should indicate nearly full output35 ampsWhile continuing to run at 4500 RPM, the voltage should stabilize at about 14.5 volts and the alternator output should begin to decrease If your results vary, check the stator's condition before replaci ng .the rectifierreg latorTachometer Circuit If the VRO "no oil" warning signal is in question or if the boat's tachometer is not working, test the tachometer circuit1Verify that all wiring and Ampheno connectors are in good condition2Set peak reading voltmeter to "POS" and "50 3Disconnect the 4-wire VRO connectorAttach jumper wire to the gray terminal in the engine harness connector4Attach the meter red lead to the jumper wire and meter black lead to clean engine ground5Run the engine at 1000 RPM Voltmeter should show volts6If the tachometer circuit tests okay, check the warning horn circuitRefer to Warning Horn Test, Section 17Complete all circuits disconnected for this test r::=J The "Iow oil" and "no oil" signals alert the operator to