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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


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  #11  
Old 09-23-2012
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Re: CCA - Cold Cranking Amps question

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Originally Posted by IronSpinnaker View Post
But when you changed them did you use a random old battery from a car? We are not talking about replacing batteries with the correct one... we are talking about using an unknown battery from a car on a boat and only comparing CCAs.

Using an "unknown" battery can get you into trouble if you don't first test it first. Could have an internal short or was so sulfated it just won't take any current. The only things I have ever seen "cook" alternators, other than just plain old age and the marine environment, is running them too long at full output, direct shorts in the wiring or owners passing the battery switch through OFF with the engine running.. Big banks and AGM's have a tendency to do overheat alts but no "car battery" should ever cook a marine alt unless you have six to ten of them in parallel and depleted....
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  #12  
Old 09-23-2012
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Re: CCA - Cold Cranking Amps question

Okay well I am bowing out of this one.

Batteries are dangerous, just use your head... Hydrogen gas is both flammable and deadly toxic...
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  #13  
Old 09-23-2012
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Re: CCA - Cold Cranking Amps question

Quote:
Originally Posted by IronSpinnaker View Post
But when you changed them did you use a random old battery from a car? We are not talking about replacing batteries with the correct one... we are talking about using an unknown battery from a car on a boat and only comparing CCAs.
Oftentimes they were replaced with anything that would hold a charge. It wasn't until I had a bit of money that I worried about such esoteric concepts as the "recommended" battery.
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Old 09-23-2012
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Re: CCA - Cold Cranking Amps question

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Originally Posted by IronSpinnaker View Post
Okay well I am bowing out of this one.

Batteries are dangerous, just use your head... Hydrogen gas is both flammable and deadly toxic...
Dat's da troof, I was walking down an alley near my work once, years ago when I noticed 3 guys jump starting a small BMW in a parking lot about 100 feet away. All of a sudden I heard a loud, hard BANG and looked over to see them all jumping back from the Bimmer. A good six seconds later I heard the clunk of the battery top hitting the ground - it must have spat it more than 100 feet in the air.

Pretty scary.
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