cranking battery going dead after fishing

Hello i have a 2013 pro xs that i just got from a rebuild shop my 2254 blew up so i opted for the rebuilt 250 pro xs so here is my problem i was fishing all day on smith mountain lake when i put it on the charger to recharge the batteries the cranking battery was lower than the trolling but that day i had all electronics on i have 3 all Lowrance 12 hds 10 hds all gen 2 and a lx25 in the dash so i thought it was because running all this so the second day i only ran the lx25 end of day battery was very low that i got an alarm i put on charger it was down to last bar on charger. my volt gauge on boat is showing a little over 12 what should it read im going to put a meter on it to check voltage right at the alt is their any thing else i should check what else would drain the battery while running PLEASE HELP

How old is battery? How much reserve capacity? What does voltage read with multimeter? Have you checked charger? How often you running motor?

My old hds7 will alarm fairly often. Other unit never does, but it is on better wiring.

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Sounds like outboard may not be charging when you are running, does the voltage on depth finder go up when its running. Being rebuilt it could have a loose wire or perhaps voltage regulator has gone bad.

the battery is brand new its the biggest reserve battery i could get from battery store

Let me guess; is it an interstate battery? =junk

It should be charging from outboard.When i plug my charger in the starting battery is first one to go green and shut off.

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Originally Posted by stinger21740

the battery is brand new its the biggest reserve battery i could get from battery store

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Doesn't say a whole lot. Give us the battery brand, group and specs. Some battery shops might only carry a group 27 which would be underpowered for what you're loading it with.

Have the battery load tested and find out if your rebuilt 250 is charging as it should.

Quote:

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Originally Posted by stinger21740

the battery is brand new its the biggest reserve battery i could get from battery store

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So what are the specs of the battery? Should be a sticker with the information.

If you are running all those electronics with your cranking batter that right there is tricky. Verify the outboard alternator is putting out sufficient charge. Verify that you have a correct battery for all you require of it. Verify that your charger is functioning properly. If you still have issues you may have a bad battery or a wiring issue.

I moved all my electronics to a dedicated bttery. My cranking battery is the X2 and it starts the outboad and powers all other accessories except the electronics. I have no issues.

Maybe a dumb question but still bears asking - it’s not a deep cycle battery is it ? That’s a big NO for a cranking battery.

Quote:

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Originally Posted by bilgerat

Maybe a dumb question but still bears asking - it’s not a deep cycle battery is it ? That’s a big NO for a cranking battery.

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Unless its a "Dual Purpose"

Quote:

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Originally Posted by stinger21740

Hello i have a 2013 pro xs that i just got from a rebuild shop my 2254 blew up so i opted for the rebuilt 250 pro xs so here is my problem i was fishing all day on smith mountain lake when i put it on the charger to recharge the batteries the cranking battery was lower than the trolling but that day i had all electronics on i have 3 all Lowrance 12 hds 10 hds all gen 2 and a lx25 in the dash so i thought it was because running all this so the second day i only ran the lx25 end of day battery was very low that i got an alarm i put on charger it was down to last bar on charger. my volt gauge on boat is showing a little over 12 what should it read im going to put a meter on it to check voltage right at the alt is their any thing else i should check what else would drain the battery while running PLEASE HELP

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Your volt gauge on the dash should show at least 14 volts with the outboard running on plane. Also check what the gauge reads with the charger hooked up. Do you charge the battery every time after each outing?

Your situation sounds very similar to what I went through last year. I learned that running big-screen electronics along with my livewell system was pulling a lot more amps than I thought. I also learned that I wasn't really running the big motor for an extended period of time that would allow the alternator to do much charging. Just running from spot to spot doesn't do much. Lastly, I thought my cranking battery was good because it was only about 18 months old. I finally had it tested by my local marine dealer - he showed me that it had less than 10% of the cranking capacity that it should have even though I had charged it recently. He told me that although most batteries last a long time, they do see a "dud" from time to time. He told me that they have seen more batteries recently with a broken lead plate, most likely from rough handling during shipping. Once that happens he said that battery is done for. I purchased a new cranking battery and now everything works fine again.

Try a different battery and see if it repeats.
Then you'll know if its the battery or the alternator.

A deep cycle will crank, But a cranking batt will not deep cycle..... As long as the deep cycle meets the minimum CA for your motor....

Well, if you're not in a tournament turn all the extra crap off just run a depth finder until you get your system checked out.

its a group 31 Attachment 492244Attachment 492244

Attachment 492245

O.K.
I did some research. The only thing I could find on a Crown battery is that it's a deep cycle battery but it doesn't say a thing about cranking power. It's also expensive for its attributes. I wouldn't run a wet cell in my starting position but that's me. That battery appears to have caps to check the electrolyte level so I ASSUME it's a wet cell not an AGM.
If I were you, I'd use a Sam's Club Duracell size 31 AGM, or equivalent. The reason I say that is I have been happy as a pig in poop with mine for the past 7 years with a 200HP on the back of my Stratos.
The Crown: https://www.continuousresources.com/...-cycle-battery

The Duracell:https://www.samsclub.com/p/duracell-...gm/prod3590232


Specifications

• 1 amp hour rate:68.2
• 100 amp hour rate:110
• 20 amp hour rate:105
• 3 amp hour rate:85
• 5 amp hour rate:86
• 6 amp hour rate:87.4
• 8 amp hour rate:90
• Battery Electrolyte Composition:Glass Mat
• Battery End Type:Top Post
• Battery Purpose:Starting Lighting Instrumentation
• BCI Group Size:31
• CCA at 0 degrees F:800
• Freight Class:65
• MCA at 32 degrees F:1000
• Minutes at 15 amps:348
• Minutes at 25 amps:210
• Minutes at 5 amps:1265
• Minutes at 50 amps:87.4
• Minutes at 75 amps:53
• Minutes at 8 amps:706
• Polarity:Left Positive
• Reserve Capacity:200
• Terminal Type:STUD/SAE
• Volts:12

thanks the brand new alternator was bad finally got a chance to tear into it with my.meter