Battery Size and amps for a 2010 350 sundancer

[castelr]

I need to replace the port batteries on my 2010 350 Sundancer. Could someone tell me the battery size and CCA amps for this battery?

 

[ziekman@cox.net]

I have the '08 330, which I believe is the '10 350. My yard replaced my batteries, all 4, with Interstate (4x) 27M-XHD Size 27 Cranking Batteries. Can you look at yours, and confirm what they are?

 

[dpmulvey]

Replace them with tuhe physically largest batteries you can fit in the space. I don't know how your system is wired, but unless the P/S banks are isolated, I would recommend replacing all batteries or you run the risk of the old draining the new to equilibrium.

My thought only...... I would not spend the money on AGM batteries. In the long run there is no payback in a recreational boat. I run deep cycle wet cells all around. Deep cycles can start engines. Starting batteries cannot run house loads. I would recommend a watering system as is used in golf carts.

https://www.flow-rite.com

Costco seems to have the best bang for the buck on wet cells.

My 2 cents!

 

[insfnds]

Your boat specs are confusing. I don't think you can have Bravo III and Zeus at the same time.

Axius (and digital shift I think) require 200 amp hour battery banks per engine. This requirement would necessitate having at least two group 31 deep cycle batteries per engine.

I agree with David on battery types and styles although if you're not the type to regularly stick you head in the engine compartment to check things out, then AGMs may be for you.

 

[kaz911]

Your boat specs are confusing. I don't think you can have Bravo III and Zeus at the same time.

Axius (and digital shift I think) require 200 amp hour battery banks per engine. This requirement would necessitate having at least two group 31 deep cycle batteries per engine.

I agree with David on battery types and styles although if you're not the type to regularly stick you head in the engine compartment to check things out, then AGMs may be for you.

Axius Gen II requires less power than Axius Gen I - the steering system is no longer super high pressure as it is on mine.

But I manage fine with 2 x 75 Ah for each side. And Merc does recommend AGM batteries for Axius.

My favourite is Lifeline AGMs as you get most power (Ah) pr. lbs and almost double amount of recharge cycles compared to most other AGM brands plus a 5 year prorated warranty replacement refund. Right now I have Optima Bluetops but they are close to kicking the dirt as they do not like the heat very much. When they do I'll replace them with 4 x Lifeline G31 125 Ah batteries.

David - for AGM vs wet cell - where I am wet cell batteries last maybe 1 to 1 1/2 year if maintained perfectly.... My old sail boat still got the Lifeline batteries in I put in them - and they have lasted now 8 years and still shows more than 90% capacity. And that is in temperatures of up to 122f. Wetcell batteries does not like discharge below 20-40% - where good AGMs does not complain about 50-65% discharge. That means the amount of Ah you get in real life - is almost 40-100% better for AGM's.

 

[insfnds]

Kaz911, I have the same engine package as the original poster (albeit mine is a year newer) and my manuals calls for 200 amp hour battery banks for each engine. He should read his manual and see what it requires.

Where did you see the recommendation from merc for AGM batteries for Axius. I tried to get the dealer to install AGMs when I purchased the boat but they claim that put in the batteries recommended by Sea Ray which were wet cells. I'd like to take this back at them if I can. Thanks.

 

[dpmulvey]

Kaz911,

I've been to UAE. You are correct.... It does get a tad warm there!!!

Here with a 5 month season, I'm getting 5-6 years from Costco. Frankly, if I threw four Lifelines in Saint Max, the batteries would be worth more than I could get for the boat!!!!! :grin:

 

[kaz911]

Kaz911, I have the same engine package as the original poster (albeit mine is a year newer) and my manuals calls for 200 amp hour battery banks for each engine. He should read his manual and see what it requires.

Where did you see the recommendation from merc for AGM batteries for Axius. I tried to get the dealer to install AGMs when I purchased the boat but they claim that put in the batteries recommended by Sea Ray which were wet cells. I'd like to take this back at them if I can. Thanks.

Mercury made AGM's "recommended" when they did the White Glove Axius update. That gave owners of Axius Gen I systems a few new "features" plus many got $150 voucher per battery towards replacement with AGM batteries. SR recommend them as well for boats with Axius. But as I'm not a dealer - I can't show you the service bulletin.

And ok - with 496 engines you need some power getting them started - but is it the SR manual - or the Mercury Engine manual you are talking about? I don't recall reading it in the Merc manual - but it has been a while since I read the 496 pages about power.

 

[insfnds]

The 200 amp hour requirement was in the Mercruiser manual.