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Message: <blockquote data-quote="JL8Jeff" data-source="post: 476934" data-attributes="member: 12995"><p>You want around 12.6 volts from the battery and with the boat running it should be showing 13.8 to 14.4 depending on engine speed.  I just had to replace my regulator/rectifier on my Mercury and it killed my 3-1/2 year old battery so I had to get a new one.  If your West Marine battery is only holding around 12 volts, you should take it back and get another one while it might be under warranty or give you the most money towards another one.  It sounds like your regulator/rectifier is bad, what year/model motor is it?</p></blockquote><p></p>