I have my father’s HR214sx. It more or less runs flawlessly and I’ve used it since I was in middle school and I’m 55 now. I use it at my beach house so corrosion is an issue. I’m trying to get the Roto- stop lever off but I don’t know how to remove the seat hinge pin to take it all apart and recondition and repaint it. The ratchet return spring also broke and I need to replace it while I have it apart. Any and all advice is greatly appreciated. Thanks.