This may seem like a silly question, but here goes. We are remodeling (FULL remodel!) a 55' 1972 LazyDays with twin Mercuiser I/O. There have been several houseboats lost this year due to leaking outdrive boots. My question is, is there some sort of "dam" that can be installed inboard around the boots to prevent flooding? Are there any other in-water preventative measures that can be taken? Thanks.