1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 200Get 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 position
Steering Friction Adjustment
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 used Do not overtightenThe steering friction screw is not intended to allow "hands off" steeringIdle Speed Adjustment