Re: my trailer is too *** heavy
Bravo Uncle Willie! I was thinking the same thing.
It's a waste of time jacking with the winch stand if you don't know the tongue weight on the trailer ball. You should be looking at 10-12% of the total weight of the trailer and boat.
Then, get the surge hitch replaced or rebuilt. The surge cylinder could move around due to having no fluid in it. It alone could be your problem.
And while you're at it, make sure you're running 50 lbs. in the tires and that the tires are the proper size for the weight. And get the bearings cleaned, inspected and repacked on any trailer you're not familiar with the history of.
Usually the OEM trailers boats are delivered on have the proper weight and adjustments made to handle the boats. You're towing with a perfectly great vehicle, so that's not the problem.