2001 F115 alternator output

[froghill]

I’m looking to see if using a group 8D battery on a Yamaha 115 outboard will harm this motors charging system. Is there a way to put an online buffer or it’s not needed at all?

 

[boscoe99]

No buffer needed.

The electrical generation system will output what is needed, up to the limits of the system. Might take a few minutes to charge the battery or might take a few hours to charge the battery. Depends upon the state of charge for the battery.

 

[froghill]

Thanks. I’m usually plugged in at dock with onboard charging system, but go out for extended runs from time to time. Don’t see over taxing this monster. Got a great deal and was cautious about using it without research.

 

[99yam40]

most have a start battery and then a house battery to run electronics so you should be able to always start the motor
Just need to set them up properly

 

[froghill]

most have a start battery and then a house battery to run electronics so you should be able to always start the motor
Just need to set them up properly

I’m looking to just use the one.
Pontoon on lake/ barge canal system in upstate New York. May carry backup battery for long weekend, but day trips normally.

 

[99yam40]

I think a starting battery and some deep cycle batteries for the other things would be better.
Is that 8D a battery that is considered a deep cycle meant to deep cycle over and over?
most batteries are not

 

[dingbat]

Your motor does not support AGM batteries. You will not have any problems assuming a flooded cell battery and adequate time on shore power to charge between uses.

Having said that, what are you doing that you need 240+ AH for a days outing?
Can you get by with 120 AH per day and save #70-#80?

That's a lot of extra weight and fuel to haul round to save a couple of bucks on a deal

 

[boscoe99]

Yamaha seems to think that the F115 is compatible with AGM lead acid batteries. Been approved by Yamaha since 2013. Many folks were using AGM lead acid batteries with Yamaha motors long before Yamaha "approved" them.

 

[froghill]

Yamaha seems to think that the F115 is compatible with AGM lead acid batteries. Been approved by Yamaha since 2013. Many folks were using AGM lead acid batteries with Yamaha motors long before Yamaha "approved" them.

Already burnt up a nice agm. 2 years old and fried a cell, over charging, so flooded is my answer there. As to why, cause I run these in my ag tractors and have a great line on them.

Don’t need that much reserve, but already have it, but don’t wanna crush my Yami. Love this engine!
Mines the black betty. Doubled out the toons for stability. Best move ever on these party huts.

 

[dingbat]

Yamaha seems to think that the F115 is compatible with AGM lead acid batteries. Been approved by Yamaha since 2013.

Not sure how that relates to model that is 12 years older. (2001)

Even if true, I take issue with purposely over charging an expensive battery in direct violation of a battery's warranty Terms and Conditions.

The advertised output of the F115 is 15.0 V

Maintenance Matters - Yamaha Outboards

Stay informed on essential maintenance practices for your Yamaha outboard. Find expert advice and helpful tips to keep your engine in top condition.

maintenance.yamahaoutboards.com

http://www.4xspower.com/PSseries-Instructions.pdf

AGM batteries are designed for use with AGM battery chargers with a MAXIMUM output voltage of 2.4 volts per cell(14.4v for 12v batteries and 19.2v for 16v batteries). AT NO TIME during charging should the battery be subjected to more than 2.4 volts per cell. Improper charging can cause damage that is permanent and WILL VOID THE WARRANTY.

The same doesn't hold true for the larger outboards (F150 and up) that have 14.5V outputs.

 

[froghill]

Not sure how that relates to model that is 12 years older. (2001)

Even if true, I take issue with purposely over charging an expensive battery in direct violation of a battery's warranty Terms and Conditions.

The advertised output of the F115 is 15.0 V

Maintenance Matters - Yamaha Outboards

Stay informed on essential maintenance practices for your Yamaha outboard. Find expert advice and helpful tips to keep your engine in top condition.

maintenance.yamahaoutboards.com

http://www.4xspower.com/PSseries-Instructions.pdf

AGM batteries are designed for use with AGM battery chargers with a MAXIMUM output voltage of 2.4 volts per cell(14.4v for 12v batteries and 19.2v for 16v batteries). AT NO TIME during charging should the battery be subjected to more than 2.4 volts per cell. Improper charging can cause damage that is permanent and WILL VOID THE WARRANTY.

The same doesn't hold true for the larger outboards (F150 and up) that have 14.5V outputs.

I know my 2001 F115 TLRD put out 15-+ volts at WOT. That’s what I’m attributing my AGM failure. Extra weight in my barge doesn’t bother me at all. Just want to safely use this battery with that engine.
Thanks for the feedback. Love this site

 

[froghill]

I know my 2001 F115 TLRD put out 15-+ volts at WOT. That’s what I’m attributing my AGM failure. Extra weight in my barge doesn’t bother me at all. Just want to safely use this battery with that engine.
Thanks for the feedback. Love this site

That said. Guages my be off some, but overcharged is still answer I got from dealer

 

[boscoe99]

Not sure how that relates to model that is 12 years older. (2001)

It relates because Yamaha says that the electrical generation system of the F115 is compatible with an AGM lead acid battery. The age is irrelevant.

 

[dingbat]

It relates because Yamaha says that the electrical generation system of the F115 is compatible with an AGM lead acid battery. The age is irrelevant.

I don’t care what they say…tell that to the AGM manufacturer that denies your warranty claim when they point out the use of a 15V charging system.

No thanks… been there done that. At the end of the day AGM buys you nothing but a lighter wallet anyway

 

[99yam40]

If AMG calls for 14.4 max charging and you charge it at 14.5 or 15, that is over the allowable rate.
so that would mean none of the charging systems would be right for them.

In reality that small of a difference should not make a difference.
battery cells go bad sometimes
and most manufacturers of everything try to blame it on something so they do not have to warranty the item