HI Bruce, I do not know how much weight is required to right an I-17 but it sounds like you ought to have enough. I wonder if you have checked your mast to be sure it is sealed and not leaking. Even a small amount of water inside can make a big difference when trying to right a capsized boat. Also be sure you have extended your body weight as far outboard from the hull as possible using a loop in the righting line to put your harness hook in to make it easier. If these two things are good then I am surprised that it takes so much weight to right that boat. <br><br>