I have a 4 HP 4-stroke Tohatsu motor in which the stearing adjustment screw (or swivel bracket) does not tighten up to keep the motor from rotating.For example, I want to tighten this screw down when I want to motor and stear with the rudder (instead of stearing with the motor).Is the stearing adjustment screw (or swivel bracket) a simple thing to replace with a part from a dealer. Or is this something that a dealer needs to work on.