Re: manual tilt lock
Won't lock, huh? That's interesting. I can think of reasons why you wouldn't be able to unlock it, but not the other way around.
Is the pointy knob on the front, in the center, above the transom, present and free to swing from lock to unlock position? It is linked by a rod to the claws that grab the tilt rod. Swing it one way and it lowers the claws to grab, swing it the other way and it lifts the claws away from the tilt rod. If it were missing or broken, the claws would be in grab position all the time. You must have some kind of problem where it is stuck swung to the unlock position.