1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 352Get this manual

1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 352

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Jam Nut; Torque to 20 lbsft(27.1 Nm) Engine Steering Arm Coupler Steering Eye Rubber Sleeves Rubber Bushing Pivot Bolt and Locknut; Torque to 20 lbsft(27.1 Nm)
Both steering eyes MUST BE threade