Re: SM- Yanmar Ignition module?


Dan this is a relay that is closed on one side by the Yanmar ignition when the key is turned on (2 wires 12 volt). This 12 volt side closes upon ignition and also closes the other side of the relay switching a positive 24 volt "excite" circuit for the alternator. With this info and the stamped info on the relay should help you determine which wire goes where. BTW, you have a spare relay. 

Also, the 24 alternator will self-excite at about 1800-2000 rpm, and once self-excited will stay excited.


CW Bill Rouse
Amel Owners Yacht School -
720 Winnie St
Galveston Island, TX 77550
+1(832) 380-4970

On Wed, Dec 4, 2019, 9:24 AM Dan Carlson <carlsdan61@...> wrote:
Hi SM-Yanmar owners: I changed the fuel filter recently and knocked loose the red (24v) wire that goes from the 24v alternator positive post into the small module that is attached to the engine between the fuel filter and the engine stop solenoid (?).  The white ignition wire to the alternator also comes from this module.  It has five spade connectors and only four are used. It looks like it came off of the rear most spade. Also, if it contacts the open center spade the red alternator warning light on the 24 volt panel comes on.  

Can anyone confirm which spade this red wire should be attached to? And for my learning; it would be great to know a bit more about how this module functions.  I'm guessing or vaguely recalling that it uses some other signal like oil pressure to switch on the the ignition signal to the alternator?

Thanks and regards, 
Daniel and Lori Carlson on sv BeBe, SM#387, at Shelter Bay Marina

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