The line at the companionway that leads down through a teak block raises and lowers the board. Weight is 45# so easy to raise and lower. There should be a cleat on the teak board to secure the board when up. I'm aware of no owners manual. This email list acts as one! :-) Where are you located? :: Dave Scobie On Jun 2, 2017 7:50 PM, "Steve w" <m35nc1@gmail.com> wrote: I just purchased an M15 and I can't figure out how to lower the centerboard. If someone knows where I can get an owner's manual I'd appreciate that as well. Thanks, Steve