1993 Johnson Evinrude "ET" 2 thru 8 Service Manual, P/N 508281, Page 49Get this manual
Carburetor Adjustment r;] 1Using ball hex screwdriver, back out the throttle cam
follower screw until follower does not touch the camIf necessary, advance the throttle to access the throttle cam screwReturn to the lowest throttle setting and verify the follower does not touch the cam2To ensure the engine will start make the following initial adjustments: Turn the low speed needle in (clockwise) until it seats lightly; then back out (counterclockwise) 2112 turns Loosen the throttle cracking screwTurn the screw in turns after it contacts the throttle valve link3Install service tachometer and adjust it to the correct settingStart the engine and allow it to reach normal operating temperature[';14With the engine running in forward gear at the lowest throttle setting, adjust the low speed needle until the highest consistent RPM is attainedAllow 15 seconds between each adjustment for the engine to respond1sl5After the final adjustment, turn the low speed needle counterclockwise to prevent lean condition at idle18