your going to have to remove the sterring cable and clean the tube with some wd40 and a wire brush!!
If you don't do it now it will be solid in the spring!!!! And you will be even less a happy person!!
I know that on some or most V20 you have to remove the motor (at least in part) to get the cable out the tube *>:(
After you get it out its up to you to decide if it is time for a new cable while you have it out??
But clean all!! then get your self a Grease nut for the other end so you can grease it from time to time. They even have a oil set up for the cable to help with the rust.
Here is one item:
http://www.defender.com/product.jsp?...4&id=56157
I cant find the other one right now, but all it is, is a steering nut with a grease fitting on it so you can add grease to the cable.
Almost like the one in the picture for the oil system.
eaither way try to store the boat all the time with the wheel turned so the cable is all the way in the tube, this will keep it dry from the weather.
I am lucky anough to have a full transom with a bracket and I remove mine every fall and clean the tube abd arm, bag it and reinstall in the spring.