1989 Johnson Evinrude "CE" Colt/Junior thru 8 Service Manual, P/N 507753, Page 49Get this manual
4 Run engine at slow speed (700-800 RPM) and adjust the lowspeed needle until the highest consistent RPM is attainedAllow 15 seconds for the engine to respond to adjustment5After final adjustment is completed, turn low-speed needle counterclockwiseone-eighth turn to prevent engine from being too lean at slow speeds IN==l
Adjustment of high-speed needle must be repeated after final low-speed needle adjustment