Just remember which hole it was in the tiller arm coming out of the motor.
I'd disconnect the drag link then move the motor by hand from left to right to make sure there's no tight spots in it.
Then full lock your steering wheel to the right & left to make sure there's no tight spots in it.
Then at full left lock check the position of the steering tube where it exits the tilt tube.
Then at full right lock measure the position of the steering tube to see how much it moved.
Halve that distance and set your steering wheel at that.
Centralize your motor and see if the drag link holes line up.
It could even be that the PO changed the tiller hole which would make the drag link either too long or too short.
Having said that I bet there's 1000's of boats running around that aren't quite right and having no problems at all.