I purchased this hoist to change out powerheads / long blocks on outboard motors as well as remove and install new motors. The higher horse power outboards weigh in at over 500 lbs. up to 1,000 lbs., that I deal with. doubling the cable works just fine. It is Hung off of a 13 ft tall gantry with Vevor dual trolleys rated at 2200 lbs. each. I did remove and seal the cover with marine grade sealant and lubricate the hoist and trolleys with corrosion inhibitor before use.