Re: Evinrude 75 hp 1983 ob
Bob427 is correct. The shift rod extends up the exhaust housing, and connects to the engine just below the carbs.
I found mine when looking from the starboard side...look under and behind the carbs. I then removed a bolt holding the shift linkage to the block. I could then reach in with a long needle nose pliers to remove the pin/bolt which is holding the shift rod to the shift linkage. Good luck...not really difficult...just irritating.