1990 Johnson Evinrude "ES" Colt/Junior thru 8 Service Manual, P/N 507870, Page 50Get this manual
Carburetor Adjustment
1Using OMC Ballhex Driver PIN 327622, back out the throttle cam follower screw until the follower does not touch the cam temperatureWith the engine operating at approximately 700 RPM in forward gear and idle timing at ATDC, adjust the low-speed needle until the highest consistent RPM is attainedAllow 15 seconds after each adjustment for engine to respond0 0
112.12Start the engine and allow it to reach normal operating
3After final adjustment is completed, turn low-speed needle counterclockwise one-eighth turn to prevent lean condition in NEUTRALr.J3l 4Adjust the throttle cracking screw to achieve approximately 700 RPM (900 RPM for sailboat models)
1141 5Using OMC Ballhex Driver, adjust the throttle cam follower