Steve, So to paraphrase some New Jersey wise guys" Who wants to know?" Are you replacing the post? Are you adding a tiller arm for autopilot? Are you putting in a new rudder bearing? If you are planning something that has an interference fit with the rudder post, such as a new radial drive wheel or autopilot tiller arm, you will need the exact dimension to the nearest .001". The rudder post is hollow and is likely 2.35" (pulling this from my memory of when I worked at Edson 4 years ago) which was common for many C&C boats. That said, 2 3/8" (2.375") is a fairly standard size for stainless pipe and is easily mistaken for 2.35". There's only a few thousandths of clamping tolerance for anything that needs to grip the rudder post so precision can make a big difference in how something fits (or slips). C&C was also unique in that would often add a keyway to the outside of the rudder post for attaching fittings below deck, which is practice that is fairly common with solid rudder posts, but is rarely done with hollow steel posts. My best answer is to have someone go to your boat with a decent set of calipers and measure the diameter, not just once, but several places (fore and aft, side to side, etc.) If you are replacing a rudder post, you'll absolutely need to get a precise measurement as the interference between rudder bearing and post is critical for the boat to steer well. Worst case scenario, call Edson. While they won't certify the dimension since they didn't supply the rudders, but most of their data sheets reference rudder post dimensions for the radial drive wheels. Chuck Gilchrest S/V Half Magic 1983 35 Landfall Padanaram, MA
-----Original Message----- From: CnCList [mailto:[email protected]] On Behalf Of Steve Thomas via CnC-List Sent: Tuesday, November 29, 2016 3:41 PM To: [email protected] Cc: Steve Thomas <[email protected]> Subject: Stus-List 1980 C&C 36 Rudder Shaft Diameter I think it is two and a half inches, but I am many miles from the boat. Does anyone know for certain? Thanks, Steve Thomas C&C36 Merritt Island, FL. _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated! _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
