1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 45Get this manual
OUTBOARD INSTALLATION
2Insert steering cable end through outboard tilt tube and secure steering cable to tilt tube with steering cable attaching nut as shownTighten to specified torque
aCable endAttaching nut Steering Cable Attaching Nut Torque 47.5 Nm (35 lb-ft)
Steering Cable Seal
1Place mark on tilt tube 6.4 mm (.250 in from port end of tubeSlide plastic spacer, O-ring and cap over steering cable end, to tilt tube on engine6.4mm (.250 in