Put a new lower unit on my 1983 Evinrude 75 hp outboard. Ended up having to take apart the throttle/shift box to fix the warm up throttle slide. Everything went topsy tervy....When I put the shifter in reverse position, the propeller rotates in the forward position. When I put it in the forward position, the propeller rotates in a reverse order. Could I have messed this up by working inside the control unit *throttle/shifter"???

Thanks for any help.