Help!!! help!!! Right battery for Yamaha 50 ??

nippnsc

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Feb 8, 2014
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I have a yamaha 50 4-stroke on a pontoon boat. I need a new battery, and I am hopelessly confused. Starting battery vs. deep cycle vs hybrid??? regular acid vs. AGM???

I need a good starting battery, and the only accessory is a radio, and, rarely, running lights.

BUT--sometimes I do not use the boat for a week or two, so I need a battery that is likely to work well after that inactivity.

I don't care about cost--I want whatever will best serve my needs.


thanks!!!
 

JimS123

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Jul 27, 2007
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Re: Help!!! help!!! Right battery for Yamaha 50 ??

DC / Starting combination AGM. So much better than the rest that you'll never be disapointed as long as you take care of it. I currently have 5 - the oldest is 12 years.

Any moment someone will come on and say buy a wally $19 special and throw it out every year.
 

boobie

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Re: Help!!! help!!! Right battery for Yamaha 50 ??

Look at the cost of all these batteries and then decide what you want and how much service you expect out of them.
 

nippnsc

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Re: Help!!! help!!! Right battery for Yamaha 50 ??

Look at the cost of all these batteries and then decide what you want and how much service you expect out of them.

But I need to know what TYPE of battery would best suit my needs. I am not worried about the cost--I have been stuck with a dead battery too many times.
 

JimS123

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Re: Help!!! help!!! Right battery for Yamaha 50 ??

I listed the best type in post #2. When light usage is involved a dual purpose is the only way to go. A strong but straight starting battery won't like to be discharged and recharged a lot. An AGM has a slow rate of discharge anyway.

To go even 1 step better, buy a group 27 when your owner's manual probably specifies a group 24.

Regardless, if you buy a $2.99 multimeter from Harbor Freight and check your voltage before you ever go out, you'll never have a dead battery again.
 

matt167

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Re: Help!!! help!!! Right battery for Yamaha 50 ??

I listed the best type in post #2. When light usage is involved a dual purpose is the only way to go. A strong but straight starting battery won't like to be discharged and recharged a lot. An AGM has a slow rate of discharge anyway.

To go even 1 step better, buy a group 27 when your owner's manual probably specifies a group 24.

Regardless, if you buy a $2.99 multimeter from Harbor Freight and check your voltage before you ever go out, you'll never have a dead battery again.

Multimeters are free this month with a purchase and coupon
 

BaileysBoat

Senior Chief Petty Officer
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Sep 29, 2008
Messages
716
Re: Help!!! help!!! Right battery for Yamaha 50 ??

This comes from Yamaha-
Other Battery Thoughts
The final word on what type/size/rating of battery you must use is in your outboard?s owner?s manual ? for example, Yamaha Marine Group specifies flooded-cell batteries to avert potential overcharging gel-cell or AGM during extend periods of high-speed engine operation.


I use a good wet cell combo battery from NAPA
 

boobie

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Re: Help!!! help!!! Right battery for Yamaha 50 ??

Bailey, I think you answered it all and I agree.
 

roscoe

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Oct 30, 2002
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21,842
Re: Help!!! help!!! Right battery for Yamaha 50 ??

If you sit at anchor with the stereo (regular stereo with a couple small speakers) running for long periods of time, then get a dual purpose wet lead acid battery.

If you run the motor while using your electronics, then a wet lead acid starting battery is more than adequate.




Just about any battery out there should give you the cranking amps you need.

Look for a battery with at least a 500 cca, or 650 mca rating.


A series 27 is a bit larger than a series 24, and would give you more reserve capacity, but a series 24 is definitely enough for your use.


You should be able to get one for 80-$100, that should last for 5-10 years if taken care of.


*** But, if you have a large stereo with amps, and use it while the motor is off, then you need to install a separate deep cycle battery for the stereo.
 
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