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#11551343 - 04/18/16 09:20 PM Electronics Flickering when I crank the big motor~
JoshJones1984 Offline
Outdoorsman

Registered: 09/24/15
Posts: 132
Loc: Sanger, TX
Been noticing the last couple of trips that when I crank the big motor my lowrance units dim down and get bright until it gets cranked up. Am I correct in assuming its about time to replace the cranking battery? Probably a silly question, but I'm pretty ignorant and still very new to owning a boat.

Thanks~
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#11551349 - 04/18/16 09:22 PM Re: Electronics Flickering when I crank the big motor~ [Re: JoshJones1984]
Chris Borden Offline
TFF Celebrity

Registered: 03/23/10
Posts: 5079
Loc: Granbury
You are correct. Mine started doing this last year and the cranking battery was at fault.

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#11551353 - 04/18/16 09:23 PM Re: Electronics Flickering when I crank the big motor~ [Re: JoshJones1984]
SkeeterRonnie Offline
Pot stirrer

Registered: 02/25/03
Posts: 52566
Loc: Forney TX
Sounds like the cranking amps are weak. Have it load tested to verify
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#11551399 - 04/18/16 09:37 PM Re: Electronics Flickering when I crank the big motor~ [Re: JoshJones1984]
Mo_Cat Offline
Outdoorsman

Registered: 01/12/15
Posts: 127
Loc: LOZ
Yep, time for a new cranking battery. Once the voltage pulls down below threshold voltage during starting, your locators will power down.
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#11551442 - 04/18/16 09:54 PM Re: Electronics Flickering when I crank the big motor~ [Re: JoshJones1984]
Andrew Y'Barbo Offline
Extreme Angler

Registered: 06/25/12
Posts: 1156
Loc: Lufkin Texas
Not sure but I know the new Bass Cats have a 8ga wire ran to the console. The graphs are directly wired to that without fuses. Seems to help.

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#11551553 - 04/18/16 10:42 PM Re: Electronics Flickering when I crank the big motor~ [Re: JoshJones1984]
Mo_Cat Offline
Outdoorsman

Registered: 01/12/15
Posts: 127
Loc: LOZ
You are correct, not much voltage drop with big wire. But if battery voltage drops during cranking at battery, locators will power down.
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#11552001 - 04/19/16 09:10 AM Re: Electronics Flickering when I crank the big motor~ [Re: JoshJones1984]
SNAKEBIT Offline
TFF Team Angler

Registered: 07/11/02
Posts: 3046
Loc: GARLAND/CANTON TX.
2 brand new 1000 cca batteries in the last 6 months and the new HDS-12 G3 still flutters or goes black when cranking! doesn't turn off!
the LCX25 that it replaced never did that!!!
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#11552004 - 04/19/16 09:11 AM Re: Electronics Flickering when I crank the big motor~ [Re: JoshJones1984]
Mike_Soriano™ Offline
TFF Celebrity

Registered: 06/08/08
Posts: 5428
Loc: FORK
Take a multimeter and test it. Also check the connections, make sure they are clean/tight.
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