1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 48Get this manual
Electric start modelsTiming mark CD must align with appropriate mark on the ELEC CD flywheel grid Rope start modelsTiming mark Q) must align with appropriate mark on the CD flywheel grid Maximum Spark Advance 20 thru 30
3Toadjust, stop the engine .tocontact with rotatmg partsLoosen the timing adjustment screw nut Turn the adjustment screw CD in or out as necessary to correct the timingOne turn clockwise retards timing about 10one turn counterclockwise advances timing about 10
4Tighten the nut and recheck the timing adjustmentIdle Speed
1The boat must be in the water, under normal operating conditions with the correct propeller installedThe boat's movement must be unrestrainedThe boat must not be tied to dock or trailer'71 2On tiller models, turn the idle speed knob fully counterclockwise to the full SLOW position