1971 9.8hp model 110 merc splines only line up with shifter in reverse. After assy shifter is backwards. Can not assemble with neutral/neutral or fwd/fwd. The shift shaft blank spline doesn't line up with shift gear on motor. Also, the shift shaft will only lineup one way into LU, that being blank spline towards water pump or prop. Re-assembly is easy but, It's all backwards. HELP!!