1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 45Get this manual
Maximum Spark Advance Run the engine with the correct test propellerDo not run the engine with regular propeller or flushing adapter for this adjustment1Connect timing light to the top cylinder's spark plug lead2Start the engine and allow it to reach normal operating temperature3Run the engine at no less than 5000 RPM in FORWARDThe engine's timing pointer must align with 19 BTDC on flywheel's timing grid L!J partsAdjust the length of the spark control rod as
necessary by removing the forward socket from spark lever f71 5Rotate the socket in clockwise direction to advance timing revolutions equal approximately one degree of timing
4Stop the engine to prevent contact with rotating
L!J or in counterclockwise direction to retard timingTwo
Install the spark control rod on the spark lever and verify maximum spark advance following Steps thru 3Idle Speed
DR28 11 C