I would believe so too, but I am not so much worried about the brand as I am with the lifting capacity. I have done some math with a formula I found online and came up with a little over 6,000 pounds lifting capacity, not counting the weight of the lift subtracted. I looked on hydro-hoists website and they advertise a lift with the same size tanks as a 4,000 pound lift. Not sure if they add in any extra weight for a safety when calculating lifting capacity?
I think my boat has a dry weight of about 2900 pounds. It has a fuel capacity of 76 gallons, which should weigh a little under 500 pounds. If you add a couple of people, gear, etc. I would say I would be getting close to 4000 pounds.