1996 Johnson Evinrude "ED" 60 LV 90, 115, 150, 150C, 175 Service Manual, P/N 507127, Page 40Get this manual
10Mark the location of the inside detent tab on the detent plate11Leave the timer base detent screw loose for next adjustment INote This procedure should provide the best idle characteristics
wh ile allowing engine idle speeds in gear ranging from 600 to 700 RPMdepending 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 ATDC
Maximum Spark Advance
rn 1Verify that the spark lever screw is still loosern 2Manually advance the spark cam to wide-open-throttle position using the spark lever3With the OMC Ignition Analyzer still connected and the timer base detent screw still loose, rotate the crankshaft in clockwise direction until the timing pointer aligns with maximum spark advance listed in chart