I have a 1989 Maverick flats boat that had a 1996 150 HP Merc outboard. This motor blew up. I found a 1983 Merc 150 HP outboard that was in great shape and decided to pick it up and use it in my boat. Now I wonder if I've made a mistake. The hydraulic steering on the '96 looks different from the '83. It appears to be manual steering on the '83. What do I need to do to change out these motors? Thanks for any responses.