Winch problem
Is it the original style factory winch? There are two different thread sizes on the axle of the spool. The handle has very coarse threads, and the spool has finer threads. As the handle is turned counter clockwise, it starts to come off of the spindle. The weight of the keel will pull the cable down, causing the spool of cable to spin, which allows it to catch up to the handle and retighten the spool against the handle. This locks the spool in position.Two things you should look at are...1. Is the cable tangled, kinked, caught against some piece of hardware, etc?2. Is the boat off of the trailer?