I just took my new (to me) 77 dimarco with a 454 and a vovlo penta 280 outdrive.the first time I opened it up the boat made a right turn on me at 60 mph.so anytime you jump on it above 40 or so it really wants to turn the outdrive and when you back off at that speed or rpm it wants to go left.anyone ever hear about something like this.it has no power steering and steering cable turns easy...maybe too easy.scared me at first.