1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 353Get this manual
Figure 13Attachment Kit Installation Complete
aSteering Cable Mounting TubeAdjustment NutsAdjust Tube in This Direction to Remove Slack from Steering SystemAdjust Tube in This Direction to Reduce Tightness from Steering System
2After steering system tension is adjusted correctly, torque adjustment nuts (Figure 11) to 35 lbsft(47.5 Nm) and bend tab lockwasher against flat on each nut3Secure each steering cable attaching nut to tubes by torquing steering cable attaching nuts (Figure 12) to 35 lbsft(47.5 Nm)4Install rubber bumpers on inside of locking sleeves, then install locking sleeve over each steering cable attaching nut and secure with cotter pinSpread ends of cotter pinBe sure to install cotter pin so that it is located in-between attaching nut and grease fitting (Figure 12)5Install new trim tabs as outlined in "Trim Tab Installation," following
Figure 10Steering System Tension Adjustment (Opposite Side Routed Steering Cables)
WARNING
After installation is complete (and before operating engine), check that boat will turn right when steering wheel is turned right and that boat will turn left when steering wheel is turned leftCheck steering thru full range (left and right) at all tilt angles to assure interference-free movement