Bryan Innes
New Member
- Jun 8, 2020
- 3
- Boat Info
- 1995 Sea Ray 400 Express Cruiser
- Engines
- Twin 454 Mercruisers I/O
I am having an issue with the port alternator charging. If running on its own it’ll run at 13.4 volts but when I fire up the starboard engine it spikes and stays between 15.5-17 volts depending on RPM. The starboard motor never really goes over 13.4 volts. Both alternators tested good. Both engines run fine independently, it’s just when they are both fired up that I have the issue. At the end of last season is when it started doing it and it blew a battery up on my way home one day. Any suggestions?