[chumbucket]

Binnacle mount? If so, I've had the same problem in the past. Try putting some washers to act as spacers between the control and the console. It may be hitting underneath and preventing a full throw. Start by raising it 1/4"-3/8" and see if it works. Or, try raising (spacing) under just the front or rear of the controller. This worked for me before, then afterwards, I made a solid spacer to go under the controls. Actually, I think Yamaha makes a spacer just for this purpose. I know you're not installing a Yammi, but give it a try.
I'm sure you're ready to try anything right now just to get the f'ing thing done and out of the yard.