if you want to visually inspect the pin for wear, you will have to remove the keel from the boat by un bolting the four bolts and dropping the keel/bracket assembly. As Mel22 points out the and there are a couple good pictures of the assembly in owner modifications section. Basically what happens is the pin wears the hole in the bracket in an oblong direction, either forward/backward, or up/down. if its f/b then the keel will yawl, if the wear is u/d then it will pitch side to side. There are other things to inspect though, the keel pin for one, which can wear down at the contact point of the bracket. My p/o replaced the pin with a bolt. Not sure that it mattered, but i am sure that it lead to the premature death of the nylon bushing. As when i pulled (what was left of my keel out) the keel had thread grooves cut into it. Its also a good idea to inspect the nylon bushing which will wear also. (I installed a bronze bushing when i had my new keel manufactured by Foss Foam) The pics in the owner mod section are good examples. And finally inspect the condition of the keel itself. Another user just lost his keel. His broke in half along the same line mine did.