Boat Died
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Boat Died

  1. #1
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    Default Boat Died

    Ok so last week I posted up about a charging problem my brother 455 had. Well after searching this site we found all the correct wiring diagrams went had the alternator tested found out it was bad. Well we bought a new one and found that the shop had wired the alternator into itself by passing the battery all together. After abut 3 hours of re-wiring the boat my brother took to buena vista had zero charging problems yesterday said it's running great outside of a few minor adjustments to the carb/ timing. However he said today he took it out and the volts started to fall again and the battery went dead. Mind you prior to us re-wiring it the volts never went above 10 volts. After we re-wired it and changed the alternator the volts jumped up to 12 volts. Could the brand new alternator have gone bad? any suggestions? and Ideas??

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  3. #2
    Senior Member Schiada 201's Avatar
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    Is this a one wire alt? Just put a cable from the battery post to the battery +. If you a using a voltmeter just wire it in the 12V line to dash.

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    Senior Member Futs's Avatar
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    If it's charging, then the voltage should be in the 13.7-14.7 range on the volt gauge. If it's just showing 12v, its just showing the battery voltage. Did you put a volt meter on the battery when you rewired it to actually see if it was charging? If you just charged the battery or replaced it and took the boat out, it will work for awhile before the battery actually goes dead. I could run my boat off the battery for 3 days before I installed an alternator.

    More info on they wired it into itself? Is it a one wire deal?
    Last edited by Futs; 07-14-2010 at 03:33 AM.

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    It's a 1 wire deal but they didn't have it hooked up to the aux selinoid or the starter they had the exicter wire hooked up to something else. So we "looped" it all into the system he said it was 12 volts or higher while running I don't know what else it could be.

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    Also my boat charges at 12 volts with an 85 amp alt. It never goes above 12 volts (although) I am charging 4 bats at once for the stereo

  8. #6
    no need 2 fake it. 84Condor's Avatar
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    Quote Originally Posted by riverking View Post
    (although) I am charging 4 bats at once for the stereo

    not a big stereo guy, but you can't isolate one battery for charging at a time via a perko switch or something like that? i know that has nothing to do with your problem. but wouldn't you want maybe... 3 for the stereo and one for the motor? haha
    "i'm into snatchin' kisses... and vice-versa!" haha

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    So we tried running a direct wire from the Alternator to the battery and it still didnt work. We did the wiring based off the Hardin Marine wiring diagram. I just don't know what else it could be.

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    Senior Member sleekcraft137's Avatar
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    Quote Originally Posted by riverking View Post
    Also my boat charges at 12 volts with an 85 amp alt. It never goes above 12 volts (although) I am charging 4 bats at once for the stereo
    maybe add a second alt?
    And the new project begins!

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    we arent having the charging issue on my boat. We are having a charging issue on my brothers boat. He doesn have a stereo hooked up. Its a brand new alternator just bought it last weekend a brand new battery and it was wired wrong so we wired it to Hardin Marine's wire diagram that didn't work we ran a direct wire from the alternator to the battery and it still didnt work I am completely baffled now.

  12. #10
    Horsepower sells Engines lefty's pride's Avatar
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    12 volts is to low for a good chaging system, if the alt is good and the batt is good you have a bad connection in your system. send a pic of what you did and we might be ablew to help more. and is it a one wire? delco? or what make
    Last edited by lefty's pride; 07-17-2010 at 12:00 AM.
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    Senior Member Schiada 201's Avatar
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    Charging just 12 volts will only give you a surface charge it has to be 13.6 to 14.1 to keep the battery to a full charge. Most ignitions take at least 10 to 12 volts to run %100.

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    Ok quick update, We didn't have the 1 and 2 on the alt jumped to turn it into a 1 wire system. So after we did that we disconnected the battery wire from the Aux silenoid and ran a wire from the battery to the alternator charging wire. The volt meter shot to 12 volts and held. We let it idle for about 5 mins on the trailer turned it off tried to start it a couple more times and it started just fine. But we let it sit for about 10 mins and it wouldnt start. So something is either wired wrong or we have some bad wires.

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    I am wondering if we even need the Aux silenoid or can we un hook that and re -wire the boat I think we are having an issue there with the "constant" hot wire. Something is drawing the power when it sits and there is no stereo or lights or bilge hooked up.

  16. #14
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    Do you mean the battery is dead or the starter won't engae at all?

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