1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 174Get this manual
Midsection Adjustment40, 48, 50 Steering Friction Adjustment
L!J however, readjust after first 20 hours of operation or whenever
adjustment becomes necessary
r:;l The steering friction adjustment is preset at the factory,
i operation is maintained with minimum of operator effort
"'" The steering friction should be adjusted so that stable boat
Do not overtighten to allow for "hands off" steering which could result in loss of controlWith motor mounted to boat, adjust steering friction by simply loosening or tightening screwIdle Speed Adjustment
!3.J handleTurning clockwise on the knob increases idle speed;
r:;] The idle speed adjusting knob is located on the steering