i called this gentleman and gave him some very usefull advice.truth is when a boat sinks in sea water,there's big problems-the reason most,if not all,are "totaled".as a marine repair service operator,i've seen more than one sunk boat

.the engine's first,the fuel injected outboars,and the direct injected outboards are totaled-due to the cost of the electrical components required-fuel injection ECM,,harness's,various other components-the engines won't start and run,the water can't get fully removed from the powerheads-basically,they're junk.gone are the day of flushing carbs and pulling the plugs to blow the water out...throttle and shift cables,these may work now,but,not for long-same deal with the cable steering system.boat-well,if the batteries were"hot",count on there being a considerible amount of stray current electrolysis-look for a white powder on the aluminum-this is aluminum oxide-if it's apparent on railings and other aluminum parts-it's on the fuel tank-see where this is going ? dead batteries,this isn't the case.the electrical system,every wire in the boat will need to be replaced,every electrical component as well-with the exception of bilge pumps...
then,there's the structual end of this...
it's unfortunate when things like this occur.but,dealing with submerged boats,there's more than meets the eye