Steve, The centerboard on an M-15 is lowered by releasing the rope (line) that is probably tied to a cleat on the seatboard across the cockpit at the aft of the cabin. The centerboard cleat is next to the main-sheet cleat. Make sure the release line (rope) is tied in the up position and securely to the cleat before launching or outhauling your M-15 because any slack will get the boat stuck on the trailer. Where do you plan to sail your M-15, what body of water, what state? Steve M-15 # 335 South Puget Sound -----Original Message----- From: Steve w Sent: Friday, June 2, 2017 6:49 PM To: montgomery_boats@mailman.xmission.com Subject: M_Boats: Centerboard 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