2007 Hunter 31 with a Sprint Atlantic Gipsy/Drum model 457. The unit works fine under power both up and down. When I loosen the clutch (center winch hole) the gypsy will not turn much less "run out". I have the original manual but it is rather vague. Is there a pall or locking device that I need to release or is something corroded? Also - what is the drum for? It does not turn when the gypsy moves up or down. Any suggestions or warnings on disassembly the above deck parts? Thanks.