[williamwalter]

When I purchased my 38 open a few years ago I found the battery interconnect in open position.it was in this position through purchase and survey and for the trip up from Florida.Everything functioned fine.Basically connecting all six batteries.When I started learning my 12 volt system the manual said to leave it closed or off so you isolate the two banks. I did this but then started to have low voltage on start.suspecting the batteries were bad and the prior owner was masking the issue by connecting all the batteries I replaced them all. I load tested the old ones and some were bad so I thought I resolved the issue.Things seemed better but my issue remained. I put in digital volt meters direct to the two banks so I would have a better idea of what’s going on and am showing 12.8 volts on engine bank with the charger off but still get an almost start then clicking as if a weak battery ,loose terminal ,or corrosion in the system. I changed the mag relay on one side but that didn’t help.If I leave the interconnect open or hit the crossover switch the engines start fine.So assuming the batteries are fine I think that leaves a loose connection or corrosion somewhere in the system.Wondering if any 38 open owners ever experienced the same .