This past weekend my horn was not working on my 2010 18.5 Sport. I checked the fuse, no problem, then I went to the front of the bow and I pulled the two screws and remove the horn piece. When I shaked the horn piece it has water. As soon as I shaked the water off, the horn start functioning a bit. I contacted Sea Ray and they told me to go back to the dealer and they will replace the horn. My question is the horn waterproof? Water can come in when riding the boat inside that horn. The dealer said that they are rain waterproof but that is it. Does not make sense that inside the horn piece it had water. Either way I was given a new horn piece to replace. We will see if I will have more issues in the future with having water inside the horn..