Posting for a friend. Here's the scenario he lays out for me.
Bought a boat that sat for 3 years. Took it out, ran fine, everything seemed good. Bring it home, installs a structure scan ducer, and after that, no spark on cylinders 1-3-5, one entire side. Makes no sense. I think it's just coincidence that he found the problem after installing the ducer, but that's what he tells me.
Buddy came over with a spark tester, they changed out some CDI boxes, and still nothing. Any idea on what could have happened or where to start looking? Thanks for any info.
Brian