Re: How Can I Lift My 21-Foot Sailboat Off Its Trailer?
A technique that I like:
Find a friend who has a fixed-keel sailboat about the same size as your swing keel boat.
Borrow your friend's big tall keelboat trailer to temporarily haul out your boat. It helps if the keelboat trailer has adjustable-height support pads.
Now you should be able to lower your swing centerboard/keel at least most of the way.
And you don't have to pay hundreds of dollars to put your boat in a boatyard hoist or brave the dangers of a do-it-yourself lifting frame.