Voltage drop

a fully charged battery will show 12.69, while running you should be seeing a minimum of 13.00 volts unless you are having alternator problems. it may be charging but not at potential, check all of your connections especially grounds, once distrubed something may have come loose......98% of ALL electrical problems are connection related

Its a Energizer Marine Starting Battery with 500 CCA I believe. The one that was in there before was just a cheap car battery. I am going to grab a Voltmeter and clip it strait on to the battery this weekend and see what it does at the battery level. I would think that should tell me if its and alternator issue or not. The thing that is really confusing to me is that the old car battery seemed to do better than the Brand New Marine Battery.

I want to see if I am getting a "true" reading on the dash guage as compared to the what the battery is really putting out. I would think if I dont get around 13 volts directly at the battery when running then that would indicate the alternator isn't charging properly.   

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I clean all my connections and had some luck but not much when I turnned on the blower etc. Also do you think 500cca amps is enough ? I run 850

form&function wrote: My gauge reads just over eleven but at the battery its thirteen.turns out from the factory the entire boat runs off one small power wire causing a drop at the dash anytime you use anything.

you are rigth on the problem..
mine acts like that also..poor dash power...
at the battery or alt it shows 13..
dash 11...
when I turn the lights all gauges get wacked...voltage drops..and the Tº raises 10º

I had a problem with my alternator not charging last year. The first thing I did was blame the battery or alternator. We tried everything. Guess what it was? The belts were worn and were not gripping the pulleys like new ones and thus were slipping and not charging. Don't know if this would help but you may want to look in to it.

scott

Oh and one other thing I noticed is that when I turn on the running lights all of the guages are way off and do some crazy things.