Just changed the impeller. Big problem, reverse is now forward and forward is now reverse! I have neutral so the engine will start. The shift lever descends in reverse, not forward. I can connect the shift rod to the lower unit only in reverse. In forward the shift rod is not down enough to make connection. I ran the motor on ear muffs. When I put the engine in forward the prop turns counterclockwise and in reverse the prop turns clockwise. Don't know how to correct. Please help. Sullmate