Re: 24V Alternator



Since what you have is a repowered SM, I am not sure that I can help further without knowing more. I think it is likely that the issue is a loose connection, but could be an internal problem with the alternator, like a blown diode. I am not sure which 24v alternator you have, and that may be the reason for no excitement at high rpm. 

Maybe try to locate the small relay shown on the right side of the photo I included...if/when you find it, trace the wires to find the one that goes to the excite connection on your 24v alternator, assuming it has one and does not rely on internal excite. 

CW Bill Rouse Amel Owners Yacht School
Address: 720 Winnie, Galveston Island, Texas 77550 
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On Mon, Nov 29, 2021 at 8:40 AM karkauai via <> wrote:
Thanks Bill,
No, even running at 2400rpm, no joy.

I will chase the excite wire to it's origin (where does it usually originate?) and do a couple of tests of the alternator and regulator that I found in the regulator info.  I'm in a little over my pay grade, but no electricians available anytime soon.

Kent & Iris

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