hey i have the same problem with my 81, the hulls dont leak but i am guessing water gets in around the pylon on the port hull. i only get water in the hull on windy days when theres a lot of spray and the hull is being immersed. it stays dry on light air. the starboard hull doesnt leak . i have put silicone around the hull-pylon joint but it still leaks. anybody out there, help!