1992 Johnson Evinrude "EN" 90 deg. Cross V Service Manual, P/N 508145, Page 42Get this manual
Maximum Spark Advance Run the engine with the proper test wheelDo not run the engine with propeller or flushing adapter for the adjustment1Install the spark plugs and connect the leadsConnect timing light to the No.1 cylinder2Start and run the engine at full throttle in FORWARD gear with the timer base fully advanced3The engine timing mark must align with the correct degree mark on the flywheel gridSee chart below Maximum Spark Advance 85thru 115 28 BTDC
PCE0026
'" 4the engine to prevent contact with rotating partsTo adjust: Loosen the locknut on the spark advance rod Rotate the thumb wheel to correct the timingRotate top of thumb wheel toward the crankcase to advance the timingRotate top of thumb wheel away from the crankcase to retard the timing Tighten the locknut and repeat Steps and 3