i have a 2009 aluminum lund boat,what i want to do is remove the drain plug that is rubber with a leaver that you bend down to make the seal ,to one that screws into the transom to except a garboard threaded brass type plug,,is this possible to do? and,another question this boat is rated for a 15 hsp motor,is it also possible to increase the rating to 25 hsp and still be leagal with in the laws ? thanks and have a nice day..................