Hello all, first time poster here... I have been helping my cousin and her kids get to know a little tin boat they brought recently. It is powered with a 9.9 4 stroke merc. As the post title states, we cannot get the motor to stay locked in the up position for when the boat is not in use. It appears that the spacer or tilt tube is just sliding past the tilt lock shuttle when we try to lock the motor in place. All parts seem to be in working order. Is there some sort of adjustment that needs to be made or something? Thanks in advance for your help. I hope my description of our problem is ok. I am brand new to this motor.