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Old 04-04-2017, 10:44 AM   #3
DavidM
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City: Litchfield, Ct
Join Date: Aug 2012
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All Yanmar engines use Hitachi alternators and AFAIK they also have more than 1 or 2 wires. Typically they have a heavy Pos output, a heavy negative, and a regulator start connection and a charging light connection.

Whether a diode type isolator is used is dependent on the boat builder. My 2006 Mainship 34T did have an isolator. The alternator pos output was connected to it and one of the isolator's outputs was connected to the common side of the 1,2,all switch and the other output was connected to the bow thruster battery.

All of the above may be irrelvant to what you are trying to know/do. Can you tell us what you are really trying to do?

David
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