This came off a Mariner 150. It will fit most of the 1980s-mid 1990s Mariner or mercury outboard.  The item works.  I had to grind the small pin off (Pictured) to punch it out because it was siezed, but it won't affect how it fits.  Please look at the pictures and make sure the unit will fit your motor.  If you have any questions let me know.