[TenBayFive]

I am dealing with similar issue on 2010 3200 I got last year. Mine is on transom gunwale over the fold out seat. Surveyor’s moisture meter went nuts around a rod holder and the flag holder. I took all those out and saw there was very little sealant, or it had gone away/deteriorated. I noted that the diamond non-skis is pulling up in that section and there is evidence of water intrusion.  As far as I can tell, the gunwales are held on w a few bolts and SHOULD/might pop off pretty easily. I almost took the whole thing off to bring to a fiberglass shop but time got away from me. I rebedded the holders with butyl tape which I am coming to love. 

As to your actual question, the diagrams I got from Tiara do not reflect balsa coring in the gunwales. However it might be that the diagram is just for the hull and decks. My memory is that it WAS wood-cored. I can try to double check later. Keep in touch if you figure this out and how to fix it. 

I have a bunch of diagrams for the 3200 from Tiara I can share w you if you don’t have. Wiring schematic, etc.  Extremely super useful. Some of them should be in the owners manual. But the online manuals do not have the appendices which are gold (wiring diagrams etc.) for your specific boat.