2007 Evinrude E-Tec 75, 90 HP outboards Service Manual, Page 130Get this manual
ELECTRICAL AND IGNITION CHARGING SYSTEM TESTS
Capacitor Test
The capacitor should charge when you use an ohmmeter on the high ohms scale with the proper polarityThe resistance will increase until it goes to (nearly) infinityIf the capacitor is shorted, then it will never chargeIf it is open, the resistance will be infinite immediately and won't changeIf the polarity of the probes is reversed, it will not charge properly eitherDetermine the polarity of your meter and mark itBlack is usually negative with VOMs, for exampleConfirm with marked diodeA low reading across good diode indicates that the positive lead is on the anode (triangle) and negative lead is on the cathode (bar)
CHARGING SYSTEM TESTS
12 Charging Circuit