1993 Johnson Evinrude "ET" 9.9 thru 30 Service Manual, P/N 508282, Page 45Get this manual
Maximum Spark Advance
No maximum spark advance adjustment is necessaryCorrect primary lead position is all that is required to maintain proper ignition timing Orangeblue lead must go to the top ignition coilIdle 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 trailerBefore proceeding with this procedure, be sure the lowspeed needle is properly adjustedRefer to Carburetor Adjustment, Section 2
rv wise to the full SLOW position.speed knob fully counterclock2Tiller modelsturn the idle
3Start the engine and allow it to reach normal operating temperature4When speed is reduced, engine must idle at 650 25 RPM in FORWARD gear