better to be under water the whole time then out of the water and unattended for some time after. Any mud inside? Remove any black boxes, hose it all out, then take any covers off of solenoids, etc and douse them with alcohol in one of those spray cans you can pressurize with a schrader valve, then blowgun dry. Motors should come apart & have the same done, then load in a low temp oven to evaporate everything. May need bearing replacement if they were wet and dried by themselves unless well greased. instruments & switches may not make it, limit switches may be sealed well enough to survive..