There are two adjustment screws. One is, as always, for the cam plunger tension. The screw located in the lower part of the housing is to set the rudder aft more if desired. Set this screw to the desired rudder rake then set the upper plate to hold the rudder forward to that position. If the upper plate is too far aft, the rudder will be allowed to slip aft under load... if the plate is set too far forward, the cam may not lock properly.
Director of Parts and Accessory Sales
Hobie Cat USA