battery Volts go to 14.9/15 at idle

[Bobfox]

I have a 2003 Yamha two stroke 150 (150TXRB) outboard that runs great. Yesterday for the first time, I noticed my boat voltmeter gauge reading 15 volts at full throttle. Today at idle, it read 14.9. While on my trickle charger is reads 13.6. Everything is working but why are my volt numbers so high? I have never seen high 14's before.

 

[99yam40]

rectifier/regulator would be my guess

 

[wmgeorge]

I have a 2003 Yamha two stroke 150 (150TXRB) outboard that runs great. Yesterday for the first time, I noticed my boat voltmeter gauge reading 15 volts at full throttle. Today at idle, it read 14.9. While on my trickle charger is reads 13.6. Everything is working but why are my volt numbers so high? I have never seen high 14's before.

I would read it with a good digital meter and I have Fluke I depend on, but even my cheap/free Harbor Freight one does an ok job.