a customer Sunk his 93 Fountain with Mercruiser 502MPI and Bravo 1. This is my first encounter with a sunken salvage job. Boat was under (fresh) water for nearly 12 hours before being noticed and retrieved. Drained Oil system + filter, Fuel system + filter and all hydraulic systems. I've turned engine over and cleared cylinders of water and sprayed water lube into cylinders to prevent as much corrosion as possible before future re-firing. as far as engine electrical is concerned, what all will i need to replace?? Any and all info and advice is greatly appreciated.