1992 Johnson Evinrude "EN" 60 thru 70 Service Manual, P/N 508144, Page 88Get this manual
118l5If the adjustment is too rich, notice your reference mark 6Repeat Steps thru for each carburetor
and turn the needle 112 revolution clockwiseWaiting 15 seconds after each adjustment, repeat this procedure until you reach the highest consistent RPM
7To test your adjustment, run engine near full throttle for three minutesReturn the engine to idle in gearThe engine should maintain smooth idle RPM If your test results vary, repeat Steps thru 5If the engine does not respond properly to these adjustments, check the following: Engine temperature Linkage adjustment External recirculation system Sufficient exhaust back pressure
Important
Intake Manifold Servicing, All Models