I purchased a 1995 wellcraft excel 26se this summer. Replaced both batteries, and the alternator, and I get low voltage 10-11 volts, only on number 1 battery. Negative lines, and positive all very secure and in good shape. I assumed that maybe there might be a loose wire within the battery...
I just purchased a 1995 Wellcraft Excel 5.7. The volt meter would start to lose voltage while boating from 13-14 down to 11 on both batteries. I replaced the alternator (marine grade) and both batteries, also marine. I noticed that when running on # 1 battery, the voltage will drop down to 11...