1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 346Get this manual
Steering Eyes and Coupler Installation
1Position engines so that they are facing straight forward(Distance between centers of threaded pivot bolt holes in engine steering arms must be equal to distance between propeller shaft centers 2Lubricate inside of rubber sleeves (Figure 9) and slide onto coupler3Slide rubber bushings (Figure 9) onto steering eyes4Thread steering eyes (Figures and 10) into coupler and adjust steering eyes so that distance between centers of pivot bolt holes in steering eyes is the same distance as between centers of threaded pivot holes in engine steering armsExposed steering eye threads should be equal at both ends of coupler and must not extend out of coupler more than 2-34 (70mm)a Engine Steering Arm Steering Link Rod Steering Eye and Coupler Pivot BoltsTorque to 20 lbsft(27.1 Nm) LocknutsTorque to 20 lbsft(27.1 Nm)