1991 Johnson/Evinrude EI 60 thru 70 outboards Service Manual, Page 96Get this manual
1181 5Ifthe adjustment is too rich, notice your reference mark and turn the needle 1f12 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 5
If the engine does not respond properly to these adjustments, check the following: Engine temperature linkage adjustments External recirculation system Sufficient exhaust back pressure
Important