Moderated Discussion Areas
  ContinuousWave: Small Boat Electrical
  Dauntless/Verado - AGM Battery Selection

Post New Topic  Post Reply
search | FAQ | profile | register | author help

Author Topic:   Dauntless/Verado - AGM Battery Selection
RobP posted 08-15-2010 11:07 AM ET (US)   Profile for RobP   Send Email to RobP  
Short question:
What brand/model of AGM Group 24/34 batteries are people using on the smaller whalers with the Verado Engines, any boats that have a group 24 battery tray/boxes?

Long version:
I have a 2008 200 Dauntless that I need to replace the batteries on. The boat is 1 year old and was delivered with two Interstate Group 24 batteries. After learning the hard way, I have found out that I should have insisted that prior to delivery the batteries were replace with AGM batteries. Yes I know now that both Mercury and Boston Whaler say that the batteries should be AGM.

The problem I have been having is finding out what Group 34 AGM battery meets the minimum 800 CCA and 1000 MCA ratings required for the 200 hp Verado (4-cyl).

The Dealer I have been working with sells Optima Blue tops, (I know Glen at the VOG does not recommend the Blue Tops) but they gave me a super price on two Optima Blue Top D27M.

I found the site below that lists the recommended Optima battery for various motors and the D27M was on that list so I though I was OK. If you look at the list there is no Group 24/34 battery on it.

After taking out the old Group 24 batteries I found that the D27M is a group 27 battery and is much larger and will not fit in the trays that BW installed. I removed the factory trays and got new Group 27 trays but I don't like the configuration that they would need to be installed in, two of the screws would miss the wood beneath, plus it would be to hard to reach the mounting nuts.

So I'm back on the hunt for batteries.

I went to the Verado Owners Groups and found the list of AGM batteries that Mercury recommends, (Odyssey, Optima, West Marine Sea Volt, Cabella's Advance Angler, Trolling Thunder, Excide Megacycle, Sears Die Hard Platinum and Deka Sea Mate) but there appear to be just a few Group 24/34 batteries on that list.

The Sears Die Hard Platinum 34M with a CCA of 880 looks like the best bet but it does not list the MCA on the web site.

But I'm wondering what batteries are Dealers providing with new boats?


jimh posted 08-15-2010 01:51 PM ET (US)     Profile for jimh  Send Email to jimh     
I recommend the SEARS Platinum Die-Hard. Its cold-cranking ampere rating is 880-amperes, which is higher than the required 800-amperes for your motor. The marine-cranking-ampere rating is usually proportional to the CCA rating, so it is entirely reasonable to assume the MCA is proportionately larger than your minimum requirement.

The SEARS battery is a good choice because of the nation-wide support available--there is a SEARS store almost everywhere, or at least there used to be. The price is competitive and you can sometimes find the battery on sale for about $20 less than normal.

Jefecinco posted 08-15-2010 07:08 PM ET (US)     Profile for Jefecinco  Send Email to Jefecinco     
I believe the Sears AGMs come in group 31 and 34 sizes. If your Verado is the four cylinder the Group 34 should suffice but consider the Group 31 if you have a six cylinder Verado.

If you go to you can find the details of both battery sizes both dimensionally and electrically.

The DieHard Platinum AGMs are recommended by the Verado Club and by Mercury Marine if I remember correctly.


jimh posted 08-15-2010 07:25 PM ET (US)     Profile for jimh  Send Email to jimh     
The SEARS company is having a sale today. The batteries are 10-percent off which means a savings of $20 to $25 and makes the prices $180 and $225. Offer good for on-line orders until 4 a.m. CDT tonight. You can order on-line and pick-up at a local store.
glen e posted 08-15-2010 07:51 PM ET (US)     Profile for glen e  Send Email to glen e     
Alert the media: Jim and I agree (not that it matters to anyone here,LOL)

The Sears battery is an Odyssey re badged unit that is substantially cheaper, much to the dismay of Odyssey. It is still the best bang for the buck.

RobP posted 08-16-2010 07:09 AM ET (US)     Profile for RobP  Send Email to RobP     
Thanks for the replies! Yea if I'm going to have shell money for the battery the Die Hard looks the way to go.

I still wonder what batteries are dealers putting in new boats that they are delivering to customers. Or more importantly what batteries is BW recommending and using in boats at the factory?

After going through the list on Glen's site I found only 4 batteries that meet the MCA, CCA and Reserve Capacity ratings AND fit in the Group 24 trays/boxes that the smaller whalers are manufactured with.

Cabela's Advanced Angler - Group 24 - MCA 1195, CCA 945, RC-178, 53.5#'s and $169.99 (on sale now at $139.99)

Odessey PC1500MS - Group 34, MCA 1050, CCA 880, RC-135, $297.18

Trolling Thunder TT1050 - Group 34, MCA 1050, CCA 880, RC 135, 49.5#

Sears Die Hard Platinum 34M - Group 34, MCA n/a, CCA 880, RC 135, $189.99 (at store + $10 core)

I can't see a dealer putting in a Cabela's or a Sears battery, but I could be wrong.

Jefecinco posted 08-16-2010 09:50 AM ET (US)     Profile for Jefecinco  Send Email to Jefecinco     
Based on my recent shopping/buying experience few dealers will install AGMs on the Verado equipped boats they have on hand.

If you buy a boat equipped with a Verado you should either make the proper AGM battery installation part of the deal or buy the boat less the batteries and purchase and install your own AGMs. Be careful, those hummers are darn heavy.

When making the purchase I did not have the time to wait for an AGM to be installed so will have to do it myself. I bought out of town and it would have been necessary for my Admiral and me to spend another day and night in St Louis. It would have cost more than the battery.


RobP posted 08-16-2010 05:20 PM ET (US)     Profile for RobP  Send Email to RobP     
Any idea if Boston Whaler has a list of batteries that meet the minimum requirement of the motor they provide with the boats and fit in the group 24 battery tray they installed?

I find it hard to believe that all Dealers have been providing the wrong batteries to customers since Mercury start requiring the use of AGM batteries.

Jefecinco posted 08-16-2010 08:02 PM ET (US)     Profile for Jefecinco  Send Email to Jefecinco     
In my experience most dealers, including the vaunted "MarineMax", reduce the cost of doing business in just about any way they can. Many believe that it is not their job to educate consumers and their selling tactics demonstrate that.

I'm with you in that I do not believe, nor did I say I believe, that all dealers have been providing the wrong batteries to customers since Mercury began recommending the use of AGM batteries with Verado engines. Mercury does not REQUIRE the use of AGMs with Verado.

I'm sure that there are many Boston Whaler dealers that install AGM batteries on boats they sell with Verado engines as a matter of course. There are plenty that do not unless the buyer demands it.


RobP posted 08-16-2010 10:26 PM ET (US)     Profile for RobP  Send Email to RobP     
I took a look through the 2008 Merc Verado Owners manual and several times it says the AGM batteries are required. I doubt this has changed.

I also downloaded the 2010 Dauntless Owners Manual and it says to use only AGM batteries with the Verado. This appears to be new to the BW manual since the 2008 and 2009 model years manuals do not make a specific reference to the AGM's.

I have to say my dealing is working hard to resolve this.

number9 posted 08-17-2010 07:17 AM ET (US)     Profile for number9  Send Email to number9     
May not be on the Mercury list but West has the 34M Duracell AGM for $150 thru 08-22-10.
glen e posted 08-17-2010 11:05 PM ET (US)     Profile for glen e  Send Email to glen e     
This is not subject to Whaler, a dealer or a customer's opinion or whim.. If you buy a new Verado installed on a new boat from a dealer after May of 2008, it REQUIRES the dealer to put in an approved AGM type battery. It is spelled out everywhere; manuals and stickers on the boat, but particularly in detail in the Mercury Dealer Service bulletin of May 2008, #2008-04.

Therein lies the problem. Some dealers are cheap and this cuts into their profit, as batteries are usually part of a flat rigging "get ready" fee. He hesitates to increase this fee. Therefore he cheapens out, claims ignorance, and puts in less than AGM batteries.

But make no mistake, they are required per the manufacturer for NEW boats.

jimh posted 08-18-2010 06:33 AM ET (US)     Profile for jimh  Send Email to jimh     
Re the WEST Marine Duracell AGM 34M battery: according to html

they are currently out of stock. I guess the $150 promotion has been effective at generating sales. It looks like a very good battery and the price is about $50 lower than normal for this size and capacity.

RobP posted 08-18-2010 10:11 AM ET (US)     Profile for RobP  Send Email to RobP     

The Duracell misses the mark by a hair,

795 CCA - 800 required
970 MCA - 1000 requires
120-minute reserve capacity - 135 required.

I also suspect that there is a lot of "This is the way we did before so it must still work, never mind what the Service Bulletin says" assuming that they read it.

Whaler issues their own serivce bulletins as well, anyone have access to them?

RobP posted 08-18-2010 10:14 AM ET (US)     Profile for RobP  Send Email to RobP     
I went back and looked at the various Boston Whaler owners manual and only i for the 2010 model year did they start including the AGM information and the minimum battery requirements.

There is still references to making sure the water level are full in the batteries. Looks like they need to do some more editting.

Post New Topic  Post Reply
Hop to:

Contact Us | RETURN to ContinuousWave Top Page

Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.