I haven't been able to adjust my linkage so reverse works. When I adjust the cable linkage so reverse works then forward doesn't! The gears grind and the throttle increases so it does't engage. When I re-adjust so forward works, I get the same symptoms in reverse. I wonder if it is more than a linkage adjustment? It is a 1977, 4- cylinder 85 HP Evinrude engine with mechanical shifting.John.