Just replace it... unless the stator wires are totally rotten and shorting -
it's GOT to be the rectifier.

-W

"Bob.W" wrote in message
oups.com...
I have a 1965 MERC 900 - 90 hp and does not seem to be charging.
was told to test the DIODE STYLE RECTIFIER first.
Does this sound right, and how should I test it.