1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 351Get this manual
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Steering Eyes and Coupler Installation
50061 Rubber Bushing Rubber Sleeve Jam Nut; Torque to 20 lbsft(13.5 Nm) Coupler Steering Eye
Figure 7 Steering Link Rod Assembled on Steering