1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 88Get this manual
r:J8l 5Ifthe adjustment is too rich, notice your reference mark and turn the needle 112 revolution clockwiseWaiting 15 seconds after each adjustment, repeat this procedure until you reach the highest consistent RPM6Repeat Steps thru for each carburetor7To 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 58Use RTV Sealer, OMC PIN 263753, to seal the end of the adapter sleeveIf the engine does not respond properly to these adjustments, check the followi ng: Engine temperature Linkage adjustments External recirculation system Sufficient exhaust back pressure
Important
Intake Manifold Servicing, All Models