It looks as though the locking mechanism on the casting is not locked into the other casting, and the arm is bungeed to the other arm to keep them in the down position.
Well the bungee may helps to keep the rudderdown, but the they are actually locked down by a plastic nut and the opposite on the casting
![[Linked Image]](http://www.catsailor.com/bb_files/74742-VentiloRudder.JPG)
