So hopefully I can help someone else from making the same mistake. I added a couple graphs to my bow and wanted a bigger starting battery to handle it all. Current one wasn’t cutting it. I went with a bigger AGM battery which I didn’t know, older 2 stroke Mercurys can’t handle it. Mine is a 2004. It ended up melting the altinator regulator. The new Mercury 4 strokes don’t have this issue. Found this out while my boat was getting winterized.