I am new to this site and looking for some advice on a smart craft issue. My 2005 Sundancer has twin 5.0 mercs with bravo III drives/400 hours. Over the summer I started the boat and it was running fine, all gauges working etc. I turned off the boat to get a few items and returned to restart her. This time the boat started and ran perfect, but none of the gauges worked. I had several dealers and mechanics look at the boat, and through trial and error they determined the ECM's needed to be replaced, as well as the harness. In addition all the dash gauges were also replaced. This did correct the problem for about one or two months, but then the same thing happened again. The boat runs perfect, but the gauges again do not work. Some believe that the boat may have had a power surge, others believe it may have something to do with the new exhaust manifolds that we replaced last spring. I am at a loss and looking for any suggestions.
Thank you!
Thank you!