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Thread: Marine Batteries

  1. #1

    Marine Batteries

    hi

    I am looking to get 2 new batteries for my boat, I have had century marine pro 780 so far and now they need replacing. Do I just replace them with the same or is there a better alternative around now??? I have a 40 hp 2 stroke yammy and electronics etc etc so I don't think I need a high crank battery ???? I live in the morayfield area, so it would be great to stay around here to purchase them

    Love any input guys, thanks

    Gaz
    Cheers Garry


    A bad day fishing, beats a good day at work!!!!!!!!!!!!!

  2. #2

    Re: Marine Batteries

    I'd keep to the same brand there good there's a few places to get them look around wait for a sale at bcf or super cheap or have a Google and ring around.

  3. #3

    Re: Marine Batteries

    Quote Originally Posted by chris69 View Post
    I'd keep to the same brand there good there's a few places to get them look around wait for a sale at bcf or super cheap or have a Google and ring around.
    They're big batteries for a 40 hp, I use my old ones of that size once they start loosing a bit of charge on my 30 Hp 2 stroke and the last one is still going strong. My current 780 CCA 100amp is starting to lose a bit of charge, down to 12.45V after charge so I might have to buy another boat top put it in when I replace it.

    Why 2 batteries, just one of those would easily run your motor, sounder, radio etc. or do you run an electric motor as well because then I would change the setup to one crank battery and one deep cycle.

  4. #4

    Re: Marine Batteries

    Best to keep the batteries the same size yes there big but if one dies and you have 2 smaller batteries then a smaller one might not do what you want,I'm unsure of how Garmin1 fisher so getting 2 batteries they've had used before and knows is the best choice in my opinion the bigger the battery the less draw so they should last longer.

  5. #5

    Re: Marine Batteries

    Small motors will not always fully charge a big battery, a 40 will require a medium size battery at the most, unless you are using an electric motor too.

  6. #6

    Re: Marine Batteries

    I like the Supercharge Seamaster Gold marine batteries.

    The last pair I replaced at 8.5 years. And they were still going good.

    I get them from Stones Corner Marine, they have very competitive prices. Were better than specialist battery shops when I got the new ones.
    Note to self: Don't argue with an idiot. They will only bring you down to their level and beat you with experience....

  7. #7

    Re: Marine Batteries

    Just let me step in here - you shouldn't be running a electric motor off your starting battery . A leccy needs its own stand alone power source which is a deep cycling battery . These things can draw 50amps an hour when running flat out.


    Marine batteries are dual purpose - cranking with some deep cycling capacity ( enough to run low draw accessories like lights , radio ) once you start adding sounders , live bait pumps , stereo - you really should be thinking of dual batteries . The last thing you need is over the course of a days fishing where you haven't done a lot of running around on the motor you go to turn the key only to find you have a flat battery.

    Chris
    Give a man a fish & he will eat for a day !
    Teach him how to fish
    & he will sit in a boat - & drink beer all day!
    TEAM MOJIKO

  8. #8

    Re: Marine Batteries

    Quote Originally Posted by NAGG View Post
    Just let me step in here - you shouldn't be running a electric motor off your starting battery . A leccy needs its own stand alone power source which is a deep cycling battery . These things can draw 50amps an hour when running flat out.


    Marine batteries are dual purpose - cranking with some deep cycling capacity ( enough to run low draw accessories like lights , radio ) once you start adding sounders , live bait pumps , stereo - you really should be thinking of dual batteries . The last thing you need is over the course of a days fishing where you haven't done a lot of running around on the motor you go to turn the key only to find you have a flat battery.

    Chris
    Totally agree, we still don't know what Garmin1 is running. I run a 4.2WB Dory and being electric start it gets batteries from the 6m offshore boat that don't come up to scratch. It has a leccy also totally separate from the starter. I'm still waiting to see what Garmin1 has as a setup that requires 2 cranking batteries (each suitable for starting a couple of 150 hp motors or more) on an unknown boat.
    Garmin1, please give a little more info. At the least you can have my battery which will start your motor for at least another 3 years.

  9. #9

    Re: Marine Batteries

    Thanks guys for the input from you all, to define things a bit more I mainly wanted to make sure I had a "spare" battery in case of overnight fishing and one may have gone flat etc and also for safety too, I don't want to be the one on the news who has to call rescue because of a flat battery. I don't have a leccy, so it is starter meter and sounder, nav lights and marker light over night. Over kill maybe but I wanted to have some redundancy in case of battery failure or some mishap. I am almost leaning now to just getting two new century batts. I did look at agm style batteries but they are not cheap for the amount of work I put the boat to. I love the forum as it brings in so many points of view, so thanks for chipping in. I hope that clarifies things for you. By the sounds of it I have gone overkill on the battery side. I have a switch so that I can have either battery or both batteries together too I wanted to add.
    Cheers Garry


    A bad day fishing, beats a good day at work!!!!!!!!!!!!!

  10. #10

    Re: Marine Batteries

    Another vote for the Seamaster Gold batteries. Looking on line I have usually been able to get them for roughly $170 -180 dollars - last one was from Wynnum batteries. Look into what is involved for pull starting your engine. Although not recommended, on my last electric start tinnie that ran a 40hp 2 stroke, I did dual purpose my batteries by using AGM's to also allow the same batteries to run an electric. On the one occasion I managed to run them down enough it wouldn't start after an 18 hour day, it was pull started easily - I knew it could be done so wasn't concerned.

  11. #11

    Re: Marine Batteries

    Yes it’s great to have the peace of mind of two good strong batteries. Don’t forget to alternate usage eg start on batt 1 cruise to fishing spot then switch to batt 2 for the run home. Also I’m sure you could also pull start the 40 quite easily if the batteries failed

  12. #12

    Re: Marine Batteries

    Allstar batteries

    Brendale store - 0413 692 236
    Caboolture store - 0413 430 218
    North Lakes store - (07) 3048 2293



  13. #13

    Re: Marine Batteries

    Actually Paul, I have never used the spare battery in the manner you mentioned. I do put em on charge etc but I will from now on switch em over lol Kinda obvious really once someone says it. Dooooh I will be looking to see if it can be pull started and if so make up a starter cord for it,


    Quote Originally Posted by Paul071978 View Post
    Yes it’s great to have the peace of mind of two good strong batteries. Don’t forget to alternate usage eg start on batt 1 cruise to fishing spot then switch to batt 2 for the run home. Also I’m sure you could also pull start the 40 quite easily if the batteries failed
    Cheers Garry


    A bad day fishing, beats a good day at work!!!!!!!!!!!!!

  14. #14

    Re: Marine Batteries

    Excellent as charging and discharging the batteries increases their longevity and also on any given outing you will know when one battery is starting to become exhausted.
    Just don’t ever turn the battery switch while the engine is running I’ve heard this can fry the computer and leave you stranded. Maybe someone can confirm?

  15. #15

    Re: Marine Batteries

    I ended up buying two new century Marine pro 580's......... They mightn't last as long as agm style batteries but I can buy two new batts for the cost of one agm (approx). It was nice to hear the motor kick into life once again.

    I will keep that in memory about switching while the boat is running, thanks Paul.

    P.S. The smaller batteries weigh so much less than the larger ones..

    Cheers

    Gaz
    Cheers Garry


    A bad day fishing, beats a good day at work!!!!!!!!!!!!!

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