1998 Johnson Evinrude "EC" 2 thru 8 Service Manual, P/N 520202, Page 45Get this manual
Carburetor Adjustment INotel The motor must be mounted on the boat and in the water, or in test tank, with appropriate propeller or test prop installed to make this adjustment rn
1Make the following initial adjustments: Using ballhex 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 cam
Turn the low-speed needle in (clockwise) until it seats lightly; then back it out (counterclockwise) turns Turn the cracking screw in until the spring is fully but lightly compressed
2Start the engine and allow it to reach normal operating temperature[] 3With the engine running in FORWARD gear, adjust the throttle cracking screw to achieve 700 RPM (900 RPM on Sail models)[] 4Adjust the low-speed needle until the highest consistent RPM is attainedAllow 15 seconds between each adjustment for the engine to respond[] 5After the final adjustment, turn the low-speed needle 18 turn counterclockwise to prevent lean condition at idleReadjust the throttle cracking screw to 700 RPM (900 RPM on Sail models)