1989 Johnson Evinrude "CE" Colt/Junior thru 8 Service Manual, P/N 507753, Page 52Get this manual
Carburetor Adjustment r:J1l 1Using OMC Ballhex Driver PIN 327622, back out the throttle cam follower screw until the follower does not touch the camr:J2l Start the engine and allow it to reach normal operating 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 respond 0
3 After final adjustment is completed, turn low-speed needle counterclockwise one-eighth turn to prevent lean condition in NEUTRALf131 4Adjust the throttle cracking screw to achieve approximately 700 RPM (900 RPM for sailboat models) f141 Using OMC Ballhex Driver, adjust the throttle cam follower screw until the follower contacts the cam and engine RPM begins to increaseThen back off the screw one-eighth turnDisregard alignment mark on throttle cam If engine RPM begins to drop off as the cam follower is adjusted into the cam, the low-speed needle is too lean Readjust and repeat step Wide Open Throttle Stop Stop the engineRotate the armature plate to wide open throttle position Using OMC Ballhex Driver, open or close the throttle cam until the roll pin in the carburetor throttle shaft is in vertical positionAir silencer assembly must be in place to achieve the minimum test propeller RPM