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seahorse

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Reply with quote  #16 
service bulletin 2017-02(D) says in part:

This bulletin is to inform Evinrude dealers of a revision to the battery recommendations for all Evinrude outboards

The battery charging system of Evinrude outboards is designed for use with lead acid type batteries only, including “AGM” and “Gel” type batteries. 

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11beforesunrise

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Reply with quote  #17 
Seahorse that seems confusing. Only and including.
jimh

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Reply with quote  #18 
Quote:
Originally Posted by 11beforesunrise
Seahorse that seems confusing. Only and including.


An AGM battery and a GEL electrolyte battery are lead-acid batteries. I don't see much confusion in the Evinrude declaration.

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jimh

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Reply with quote  #19 
Quote:
Originally Posted by seahorse
service bulletin 2-17-02(D) says ...


Can one properly infer that the "02" trailing digits refer to 2002?

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rickmcd53

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Reply with quote  #20 
Jim, probably an autocorrect typo
Bulliten 2017-02 (D) revised battery recommendations.
jimh

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Reply with quote  #21 
RICK--thanks for the information that the cited bulletin was probably published two years ago, 2017. 

Is there an inference that this change was retro-active and applied to E-TEC engines made prior to 2017?

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Maverickca

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Reply with quote  #22 
Quote:
Originally Posted by 11beforesunrise
Are the weights of the AGM batteries similar to a deep cycle battery? Group size to group size.


In my specific case the new AGM starting battery was certainly heavier than the same size conventional lead-acid battery with similar specs that it replaced:

Interstate 24M-XHD @ 44.6lb  CCA/CA/RC = 800/1000/135

Northstar  NSB-AGM24M  @ 57lb  CCA/CA/RC =840/1010/160

For weights of other Northstar battery sizes:

https://www.northstarbattery.com/products

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tmd11111

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Reply with quote  #23 
FWIW I've been running a group 31 Duracell AGM from Sam's Club for almost 2 years now on my 175 G1 as a starting battery that also powers three 9" graphs and livewells  without issue.  
Maverickca

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Reply with quote  #24 
Quote:
Originally Posted by Shenanigans
For what its worth.....I've been using a small yellow top Optima battery for 2 years on my 225HO...and it was a used battery when I installed it. Its been fine. Its only a 450CCA battery which is too small but has been cranking just fine. I leave it on a solar panel trickle charge over winter.


Interesting. The yellow top is an automotive battery. I guess the vibration resistant design of an AGM battery makes this possible for use as a marine battery.

BTW, some chargers, even trickle chargers may not be suitable for AGM batteries. Here's an excerpt from Battery Tender web page (bold red is my emphasis):

Battery Tender Power Tender Plus Battery Charger

The Power Tender Plus is easy to use, it's rugged, it's compact, it's packed with power, and it's backed by the reputation of Deltran.

Water resistant, shock and vibration resistant, lightweight (less than 4 pounds) compact charger designed for either portable operation or permanent mounting. Charges and maintains both flooded and sealed, maintenance free, AGM, and lead acid batteries. Float / maintenance function maintains batteries at proper storage voltage without the damaging effects caused by trickled chargers.

It's this type of warning that had me install a Marinco onboard charger

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olypopper

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Reply with quote  #25 
Quote:
Originally Posted by jimh
RICK--thanks for the information that the cited bulletin was probably published two years ago, 2017. 

Is there an inference that this change was retro-active and applied to E-TEC engines made prior to 2017?


The information provided in the bulletin is inclusive to all Evinrude outboards, not just ETEC.  

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seahorse

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Reply with quote  #26 
Quote:
Originally Posted by olypopper


The information provided in the bulletin is inclusive to all Evinrude outboards, not just ETEC.  



My original post contained a typo which has since been corrected. The service bulletin #2017-02(D) means it was the second pre-delivery (D) related bulletin for that year. 


Being a 2017 bulletin I doubt that it would affect every Evinrude outboard from the past to the present.  Chances are it applies to the E-TEC series of outboards due to the EMM design.

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ElderSparky

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Reply with quote  #27 
That would be an accurate statement.  The E-TEC EMM design, regarding battery charge voltage regulation and/or control is unchanged throughout its design cycle.
jimh

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Reply with quote  #28 
There we have it: a clear statement that ALL Evinrude E-TEC engines are completely suitable for charging AGM batteries

But how do we reconcile an anecdotal report of failure of an AGM battery after only two years of use with an E-TEC like this one:

Quote:
Originally Posted by cpflaum
When I ordered my flats boat with a 225HO G1, I specified AGM batteries. They died in two years.


The problem with this anecdotal account is there are no details of how the batteries were used and how they were recharged. The failure of an AGM battery in only two years of service might be unrelated to the battery's use of AGM construction. There are two situations that tend to reduce the service life of ANY lead-acid battery:

--deeply discharging the battery, and leaving it in state of deep discharge; this is particularly true for a battery that was designed to be an engine starting battery. Engine starting batteries should never be deeply discharged. They are designed to deliver very high current for a very short time, then immediately be recharged. If you use a starting battery and run other loads from it while the engine is not running, and let the battery charge fall to low-state of charge, the battery's service life is shortened. It does not matter how it was constructed: flooded cell or starved electrolyte. 

--chronically over-charging a sealed battery, causing it to boil out electrolyte; this is true for any valve-regulated lead-acid battery (VRLA). All AGM batteries are VRLA batteries, too. If you put an AGM on a inappropriate charger and let it sit charging for months and months, you can lose electrolyte.

Also, as in every product, there are very good AGM batteries and not so good AGM batteries. Maybe the ones that only had a two-year service life were not the best quality AGM batteries.

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