Kick up rudder failure!!
The kick up rudder tends to "kick up" slightly while sailing. This alters the steering drastically.There is a lot of information on this problem in the archieves. Some members have made modifications to avoid the accidental pivoting of the rudder. Like drilling holes & installing plastic or nylon shear pins & other methods of securing the rudder in the "down" position.On my boat, the tensioning device was a brass flat bar tightening handle with a 3/8" female thread. This formed a nut to work with a 3/8" bolt through the rudder & aluminum head piece. Over tightening this brass handle eventually led to stripping the thread while sailing & I could have lost the rudder! I assume this was the original Catalina design.I modified this by welding a handle to a stainless bolt head & use a 3/8" nut on the other end. The stainless is stronger than the brass & one could even double nut the bolt or use a long nut for more thread engagement. Never-seize or grease should be used on the thread because SS threads tend to gall.I also installed a 1/4" X 6" diameter soft rubber washer between the rudder & aluminum head piece to provide more friction. The rudder now doesn not move up accidently & the compression bolt does not need so much tension.Regards from Canada.