now now. maybe 200lbs. and it is not difficult but it does take caution, and a simple understanding before doing. someone with experience will know the individual steps and helpful tricks look up on google the details. the mast will be slung by the crane at the spreaders. with the mast secured, stays are removed, theast lifted slightly, wires disconnected then rotated back. CAUTION the original questions do indicate little knowledge, so help is suggested. and to answer a couple questions.: the four bolts do not need to be removed, the mast sits on top, not bolted down. catalina 30 masts were mostly abodized aluminum, so look into need for painting before proceeding.