NOS OEM Quicksilver trim limit switch 805129A 3  Comes in sealed factory packaging. Port side sending unit only.  Works for all non digital Alpha and Bravo out drives.  Pics of one the we opened for listing.  Old mercruiser p/n 99122A2 for port side only trim sender.  If you have a drive trim indicator gauge you will need the starboard sender also to make gauge work.