Dometic SeaStar Mega Jackplate - Wide Mount The SeaStar Mega Jackplate was manufactured to allow boaters to maximize the output of their engines. The Mega Jackplate is a meticulously engineered electric jackplate system designed for todays large, heavy, and powerful outboard motors. This robust plate features a standard bolt pattern and is designed to fit all outboard motors on the market today. Key Features Rated to 600 HP Wide bolt pattern to fit engines such as Merc 500600 Can fit all outboar