1995 Johnson/Evinrude Outboards 25, 35 3-Cylinder Service Manual, Page 40Get this manual
4Stop the engineTo adjust, use CMC Ball Socket Remover, PIN 342226, to remove the linkage from the spark advance leverAdjust the length of the spark advance rod Turning the rod clockwise one turn advances the timing approximately Turning the rod counterclockwise one turn retards the timing 12Use CMC Ball Socket Installer, PIN 342225, to install the linkage5Repeat Steps and 4
INote This procedure should provide the best idle characteristics
while allowing engine idle speeds in gear ranging from 700 to 800 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 ATDC6Reconnect the temperature switch connectorCam Follower Pickup