I have no idea, mine doesnt do that, and its 40-20 inch and wieghs around 15-20 pounds, needs more power though, just short of moving in grass, one question, your last boat had abs wear strips on the bottom, does this one, are they removed for water use, that could easily have a huge affect on water handling, if so, take them off once, seal holse where they where and try that......hope that helped...im quite puzzled here....