Typically, one would use a hydraulic floor jack with a wide "lifting point." I keep a 3-ton jack in the garage for use when I change the oil in my vehicles, but a smaller jack would work. The trailer only needs to be lifted high enough to get the tires off of the ground. A couple of jack stands will do the trick in keeping them up in the air.
Since I have a dual trailer, which is too wide to fit through my garage door, I had to build a couple of dollies which I slide my skis onto each winter. The trailer stays outside, but without any weight on it I don't worry too much about the tires developing flat spots. I just push it a little bit forward, and then a little bit backwards, several times per month.
former sea doo owner, will never own one again
Last edited by ZARDOZ; 12-25-2012 at 08:05 AM.