alternator troubleshooting

I have a Yanmar 3HM35F - alternator question is the same as 2 and 3 GM and maybe even later engines. This is the stock hitachi alternator The boat is pretty new to me and the alternator locked up a few weeks ago. I replaced the belt and it seemed to be working fine, but I noticed that the...

Don't fix it if it ain't broke! I dismantled the alternator to clean and repaint some parts this winter. I took a photo from the front of the engine, but no picture of the alternator connections. Wires are: 1 black, 1 red marked "BAT +" , a second red and 1 blue. Markings on the alternator are...

Lately my alternator doesn’t start to charge the battery until it’s been running for 15 minutes or more. Connections are all tight and clean. It’s a Valeo 60A OEM alternator with internal regulator. Any suggestions?

2014 Marlow-Hunter 40 with Yanmar 4JH5E (54 HP & SailDrive SD50) and ElectroMaax 140a Alternator My wife and I currently own the new Marlow-Hunter 40, hull #1, which we have placed in SailTime Orange County. We have had 2 years of relatively trouble free usage with just the normal wear and...