I own a 15 ft. War Eagle aluminum boat that I use to "chase" Redfish in and around Beaufort, S.C. It is 42 inches wide w/ 40hp. Yamaha. I would like to set this boat up to apply aquatic herbicides. It will need to push a 225lb. operator plus 500 lbs. spray gear thru lilypads, surface weeds, etc... What do I need and where do I find it? Will the Honda fan motors the bowfishers use work? Rotax?