RE: "ac" vs "dc"
Nice idea, youd probably go bang though !! assuming you found some AC, i.e. gernerator, the length of cable required to use the boat would seriously affect performance and AC hates water so one leek and your have permantly spiky hair !!!!
Nice thought though, how about a small chain saw engine instead, petrol power and powerfull !!!
I know your only playing but AC is a killer, trust me im an electrition !!