Batteries? 2 cranking batteries or 1 cranking battery and 1 deep cycle

Discussion in 'General Discussion' started by Jeffrey007, Nov 9, 2019 at 2:54 PM.

  1. Jeffrey007

    Jeffrey007 New Member

    10
    Aug 25, 2019
    Seneca, SC
    1993 Searay 250 Express Cruiser
    7.4l Mercruiser and bravo drive
    I recently purchased a 1993 SeaRay 250 Express Cruiser and the batteries are dead. Not sure if the correct batteries were in the boat as they were both cranking batteries instead of 1 cranking battery and 1 deep cycle battery. Any idea what the original recommendation/installation was?
    Thanks for your help.

    Jeff
     
  2. paulswagelock

    paulswagelock Well-Known Member

    Oct 25, 2010
    pa
    2018 SDX 270 OB 300 Verado
    Verado 300
    Really depends on the load for your accessories. There are some really good dual purpose like Deka 27m6 and Sams club Duracell 31 agm that have 1000 amps of starting power but maintain a high reserve for electronics. That would be my choice for a pocket cruiser.
     
    Jeffrey007 likes this.
  3. Jeffrey007

    Jeffrey007 New Member

    10
    Aug 25, 2019
    Seneca, SC
    1993 Searay 250 Express Cruiser
    7.4l Mercruiser and bravo drive
    Thanks Paul. At this point I am only planning on using lights and radio for day trips
     
  4. Wylie_Tunes

    Wylie_Tunes Active Member

    722
    Oct 26, 2012
    Lake Wylie NC area
    N/A
    N/A
    Single engine with a 1/2/BOTH/OFF switch or twin engine?
     
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  5. Little Ducky

    Little Ducky Well-Known Member

    Jun 5, 2017
    Dickson, TN / Chattanooga, TN
    1998 290 Sundancer
    Twin EFI 5.0L w/Alphas
    Kohler 4kW
    If there's a way to tie both batteries together via a battery switch on "both" I would get buy a pair of like batteries.
     
    Jeffrey007 likes this.
  6. Jeffrey007

    Jeffrey007 New Member

    10
    Aug 25, 2019
    Seneca, SC
    1993 Searay 250 Express Cruiser
    7.4l Mercruiser and bravo drive
    Single engine with 1/2/both/off switch
    Thanks
     
  7. Jeffrey007

    Jeffrey007 New Member

    10
    Aug 25, 2019
    Seneca, SC
    1993 Searay 250 Express Cruiser
    7.4l Mercruiser and bravo drive
    Thank you. There is a switch for both 1/2/both
     
  8. paulswagelock

    paulswagelock Well-Known Member

    Oct 25, 2010
    pa
    2018 SDX 270 OB 300 Verado
    Verado 300
    Yep, 2 large dual purpose will work. Minimum 800 cca and 170 RC. Deka, interstate, Duracell / west marine (relabeled Deka) all are good.
     
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  9. dvx216

    dvx216 Well-Known Member SILVER Sponsor

    Feb 1, 2012
    orrville,ohio
    2000 310 sundancer 5.7






















    n/a
    twin 5.7 300 Hp.
    In this day and age get multi purpose marine batteries I use Deka because that what my local battery shop sells that what he recommends.
     
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  10. Jeffrey007

    Jeffrey007 New Member

    10
    Aug 25, 2019
    Seneca, SC
    1993 Searay 250 Express Cruiser
    7.4l Mercruiser and bravo drive
    Thank you sir.
     
  11. Jeffrey007

    Jeffrey007 New Member

    10
    Aug 25, 2019
    Seneca, SC
    1993 Searay 250 Express Cruiser
    7.4l Mercruiser and bravo drive
    Thank you for the help.
     
  12. Little Ducky

    Little Ducky Well-Known Member

    Jun 5, 2017
    Dickson, TN / Chattanooga, TN
    1998 290 Sundancer
    Twin EFI 5.0L w/Alphas
    Kohler 4kW
    If you have a Battery Plus in your area check their prices as well. Sams Club also runs some killer deals.

    When the time came last year I did 3 gel start/deep cycle type 31 marine batteries to replace the type 27's that were installed.
     
  13. Wylie_Tunes

    Wylie_Tunes Active Member

    722
    Oct 26, 2012
    Lake Wylie NC area
    N/A
    N/A
    In this setup, I would go with a cranking and deep cycle if I was going to spend any amount of time on the hook, on a regular basis. Or, a pair of dual purpose for occasion and/or short periods on the hook, powering accessories.

    Or, a pair of group 29/31 AGM. They go both ways. They offer good CCA and Ah.
     

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