Cruless
New member
when i fire up the port engine the alternator on my cummins qsb 5.9 is showing 12.2v at tickover, when i reach 1200 rpm it finally comes to life and shows 13.7 volts (charging) the starboard engine alternator shows 13.7 v charge on tickover, this happens every time i start the boat, is the port engine starting to show symptoms of the alternator failing or could the problem lie somewhere else?