1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 347Get this manual
50061 Rubber Bushing Rubber Sleeve Jam Nut; Torque to 20 lbsft(27.1 Nm) Coupler Steering Eye
Figure 9Coupler Assembled
Jam Nut; Torque to 20 lbsft(27.1 Nm) Engine Steering Arm Coupler Steering Eye Rubber Sleeves Rubber Bushings Pivot Bolt and Locknut