Re: Problem with Escort trailer
I had light tongue weight when I first bought the boat. After I cleaned it out, I realized the previous owner had stuffed three 6 gallon fuel tanks, the battery, a case of tcw3 oil, anchor and other stuff all under the splashwell. After removing everything and just leaving the factory 9 gallon tank and battery, the tongue weight was back to normal.
Regarding jacking the boat to remove bunks; get a scissor jack and some blocks of 2x4. Put the scissor jack between the boat and trailer frame. Depending on configuration, blocks may be needed to reach the hull. Blocks should be used against the hull to help spread the load, or jack on hard points like the transom or chines. The objective is to jack the boat so that it is resting on the bow roller (make sure the winch is pulled tight), the other bunk and the scissor jack. That makes two points of support on the trailer, and one on the jack. Then the bunk can be loosened and slid back or removed and a larger one installed. This is the method I used to get the new Loadrite trailer to fit the MFG boat.
I was looking at my trailer yesterday and the bunk supports are attached to the frame with an intergal U bolt. There are also 3 supports on each bunk. So you should be able to loosen and slide them back.
To move the axle back, jack up the frame and put suitable supports (concrete blocks, jack stands, etc) under the frame so the wheels are hanging free in the air. Then soak all the ubolts with penetrating oil and let sit before trying to loosen the nuts.
There is a forumla that will tell you how much to move an axle based on the length of the trailer, weight of boat, and some other variables to get desired tongue weight. You should do some searches to find it, as it might help reduce the amount of "move axle, lower trailer, weigh tongue, jack up, move axle, lower trailer, weight tongue...."
BTW, in the tongue photo the winch is the old style with nylon rope. I replaced it with a new winch that has a flat strap. The new winch has a longer handle than the old winch, and I had to drill new mounting holes to get the winch far enough foward so the handle would clear the bow, as well as bend the handle a bit. Or the old winch handle could be used. I like the longer handle for better leverage. Its not a problem until the boat is almost fully loaded, then watch the knuckles on the last wind or two.
Good luck.