1996 Johnson/Evinrude Outboards 50 thru 70 3-Cylinder Service Manual, Page 43Get this manual
4Stop the engineTo adjust, turn the adjustment screw in or out, as necessary, to correct the timingTurning the screw clockwise advances the timing, while turning the screw counterclockwise retards the timing5Repeat Steps thru 4
INote This procedure should provide the best idle characteristics
while allowing engine idle speeds in gear ranging from 600 to 700 RPM, depending on propeller selection If idle speed is too high, check induction system for air leaks If idle speed is too low when engine condition is correct, decrease idle timing to achieve desired RPMExample: from ATDC to ATDCMaximum Spark Advance
INote Ru the eng ne with the proper test wheelDo not ru the
engine with propeller or flush adapter for the adjustment1Connect timing light to the No.1 cylinder2Start engine and allow it to reach normal operating temperatureShift to FORWARD gear and run the engine at minimum of 5000 RPM