The C250 has a lot of  freeboard.  At slow speeds necessary for docking or approaching the trailer, windage will overcome the ability of the rudder to control the boat.  Needed is the thrust steering provided by the motor.  Very helpful, is to have the motor and rudder linked together so that the wheel or tiller can handle the helming rather than trying to steer both the rudder and motor.

An easy way to manage linking the outboard and rudder is with a soft link.  The soft link has three parts

• A line between the aft port motor quarter and rear of rudder.  The line is fixed to the motor but attached to the rudder by a snap hook to an eye on the rudder.  I like one of the brass hooks that opens like a clam on the end by a thumb lever.  They are very easy to use with one hand.
• A loop of line around the upper pintle.  The loop should be sized so that when the snap hook is removed from the rudder eye and made to the loop,  it positions the motor for straight running.
• A bungee between the aft starboard quarter of the motor to the boats starboard quarter. The strength of the bungee should be just adquate to keep load on the motor but not so much as to cause undo tiller loading. 

Motor steering is undesirable at cruising speed because of over steer so when the soft link is not desired, the motor should be locked straight.  This can be done with the friction lock on the motor or transferring the snap hook from the soft link when disconnecting from the aft of rudder to a loop of line around the upper pintle.  That loop should be sized so that the motor defaults to a straight position.    The softlink when hooked to the loop of line around the pintle for straight operation does not interfere with raising the motor.  It is simple, cheap and works very well.