If I try to lift the rudder arms or tiller cross bar to unlock the rudders it works, but the cams do not rotate so I can not lock the rudders back down without manually rotating the cams first (usually on shore with a screwdriver). Whenever I hit a shallow area, the rudders kick up fine and the cams rotate so that I can easily relock the rudders down latter. Evidently, pulling up on the rudder arm affects the cam differently than when the rudder kicks up after it hits something.

'82 H16
Sail #88863 Blue Prism