I have a 1986 Evinrude 150 hp (E150STLCDC) and my regulator/rectifier is going out. I am not sure of the brand but it was installed about 1 1/2 years ago by a marine mechanic. Could there be any reason this only lasted 1 1/2 years? I also plan on changing this out myself this time and was wondering if the less expensive after market (Sierra, CDI) electrical parts are good enough or do they go bad and not last that long? Any help is greatly appreciated.

Thanks,
Ken