I challenge the reason for the rudder being offset. They set the rudder an inch off to one side of center so that you can remove the prop shaft without having to pull the rudder first. If they didn't, replacing a bent prop shaft would go from a 10 minute job to an all weekend job. The rudder offset in itself wouldn't cause the "feedback" that you feel. If the water flowed straight back from the prop then any placement of the rudder would have the same feel, although the effect on how the boat turned might change. In addition, if the rudder was "balanced", then there would be no feedback torque trying to turn the wheel, either further into a turn or to straighten out. This is generally not a desireable thing, you want to have some amount of self return to center. Note, however, that a perfectly centered rudder may not result it the boat traveling in a straight line. In a real boat, the water from the prop does not flow straight back, it swirls and pushes off to one side. In addition, the torque of the engine tries to rock the boat one direction which causes the lean of the boat to try and steer. The swirl of the water can act directly on the rudder, trying to turn it one direction more than the other. In addition, the uneven forces of the prop wash and the tendency of the boat to torque steer will require some amount of rudder to counter act it. Some boats have a small trim tab on the rudder to help offset this. If you object to the feel of the wheel, and have such a trim tab, you can try making some adjustments. Warning: make very, very small adjustments! When making trim tab adjustments you have to realize that the trim tab is acting on the rudder, it is not steering the boat. Deflecting the trim tab to the left will make the end of the rudder, and therefore the boat, want to right. A tiny change on the tab can have a very large effect. Like Chris said, you can also accomplish the same thing by filing your rudder, but it is a lot harder to put it back the way it was!
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