60HP alternator output?

[Extremeboating]

I posted this in the wrong section perhaps. Going to try my luck in here. Mods feel free to delete the other post in the Stock motors section if you would like.

So on my trip out the other day I went and started up the boat only to find a 12.6 volt output.

I did notice that prior to starting it I was at 12.0-12.1 volts so there was some charging going on. I just recently replaced the cranking battery with an X2power AGM 34 series for whatever it's worth. This is literally it's second trip out.

Eventually after running over 5000 rpm (which is where max output of 19 amps is supposed to occur) I found a system voltage of 13.0-13.1 volts. This was confirmed with my 12 volt outlet converted to 3 amp output USB charger conversion outlet as well as my driving GPS.

I called Mercury to see what the voltage should be at idle and they indicated it should be around 13.7-14.5 volts, which sounds about right. I also asked if the alternator also was okay with charging up AGM batteries which he confirmed they indeed were. They suggested doing a battery test first. This is a 2020 model outboard for those who will ask.

Any ideas what might be going on?

[SilverFox579]

Did you fully charge the battery prior to use?

[Avanti]

I have a 60 hp. I monitor voltage via vesselview mobile, so I’m not sure how precisely the output voltage is measured.
when the battery is fully charged, I see voltages at the top of the range you indicated. For partially depleted batteries i see voltages below 14. And if the battery is very depleted I see voltage below the range you indicated.

[Extremeboating]

Did you fully charge the battery prior to use?

No I did not. I usually just let the engine charge it when I'm out there.

I have a 60 hp. I monitor voltage via vesselview mobile, so I’m not sure how precisely the output voltage is measured.
when the battery is fully charged, I see voltages at the top of the range you indicated. For partially depleted batteries i see voltages below 14. And if the battery is very depleted I see voltage below the range you indicated.

So do you think the voltages I posted on my own maybe due to a low charge on the battery?

[CatFan]

You badly need to charge between trips. The alternator voltage is limited by the current the battery is drawing.

[EuropeanAM]

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[Avanti]

As someone else posted, you should fully charge the battery then check the output.
I have an onboard charger for my starting battery, so I always start out with a 100 % charge.

[contium]

60 HP uses a stator. They really don't have much charging capacity. When I had one on a RT178, at the beginning of the day, the motor would produce 14 volts. But that would drop as the day went on.

[SilverFox579]

As someone else posted, you should fully charge the battery then check the output.
I have an onboard charger for my starting battery, so I always start out with a 100 % charge.

+1 and I always fully charge a new battery prior to use.

[JohnnyConway]

Wanted to bump this thread, is there a true alternator on the 4 cylinder 60 four stroke 60’s? Or stator?

is the available voltage limited to 14.5volts?

[Avanti]

It has a stator. I have not seen above 14.5 volts on my vessel view.