I had an issues with my hydohoist and alot of water got in my bildge, batteries are completely dead and no power to anything in boat with a charger applied to them. I opened the engine hatch(which is electrical) by jumping the switch! When I put the chrager on the battery, the charger jumps very high and after a minute seems to shut off or go really low. throughout the entire time I have no power to anything, but I do hear a low pitch noise coming from bildge. Probably the bildge pump foat stuck on. when I connect a brand new battery I get a spark and same situation. The motor is a mercruiser 502, 1996. boat is a baha 272. I pulled the dipstick and checked everything and it appears water only reached the starter/low motor. I flushed really good after trouble shooting electric, not sure where to go from here. anyhelp is greatly appreciated. Tom