My father and I just acquired a used sailboat that needs some repairs. After searching the Internet, we finally discovered that the boat is a Skimmar. We are having problems getting the center board to drop down. The bolt at the front is quite rusted and we ended up breaking off the bolt right at the first nut. Digging further (the nut end of the bolt was covered in some sort of calking or something), I found 2 more nuts. We are currently trying to get this loose so be can remove the centerboard. Through all of this, the centerboard will not drop down. All help or suggestions would be greatly appreciated!