1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 47Get this manual
Maximum Spark Advance Run the engine with the proper test wheelDo not run the engine with propeller or flushing adapter for this adjustmentr:;:;] 1Make initial adjustment of the adjustment screw to 3a 7116
in (9-11 mm) This is just an initial starting dimension
2Connect timing light to the No.1 cylinderStart and run the engine at minimum of 5000 RPM in FORWARD gearObserve the number indicated by the timing pointer with No1 cylinder timing gridStop the engine to prevent contact with rotating parts
i the engine at minimum of 5000 RPM in FORWARD gearObserve the number indicated by the timing pointer with No.2 cylinder timing gridStop the engine4Select the cylinder with the highest degree of timing and adjust the stop screw so it indicates the correct maximum spark advanceSee chart below