Dometic SeaStar Mega Jackplate - Standard 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 Standard bolt pattern Can fit all outboard engines on the market Rig