I hose the whole engine bay with fresh water, then bilge it out and let it air dry. CRC 656 spray down everywhere after that. Flush pump with the hose and backflush through the pissers. Thats about as far as I go. Maybe 3 times a season the ski gets the soap treatment.
Be careful spraying cleaners on the motor, I took the "shiny" off my ADA head by spraying the motor down with a simple green type degreaser.