1988 Johnson Evinrude "CC" 9.9 thru 30 Service Manual, P/N 507660, Page 230Get this manual
Midsection Adjustments9.9, 15 Tilt Friction Adjustment (Models Without Thru Tilt Pin Steering) Use 916 inwrench to tighten the tilt shaft nut only enough to control the return of the gearcase from TILT to RUN positionSteering Friction Adjustment
Adjust steering friction with motor mounted to boat by loosening or tightening screw with screwdriver, as shownSteering friction should be adjusted so that slight drag is felt when turningMinimum friction is required when remote steering is usedDo not overtightenThe steering friction screw is not intended to allow "hands off" steering]