1992 Johnson Evinrude "EN" 60 deg Loop V Service Manual, P/N 508146, Page 108Get this manual
Timing Wheel Indexing, Erratic Ignition Internal power pack problems or shorted isolation diodes could cause power pack to fire erratically or continuouslyTo troubleshoot this situation, you must determine that each cylinder is firing at the correct time and no more than once per revolution 1Start the engine in test tank and run it at the RPM where the problem exists
2Carefully connect an induction timing light to each cylinder, alternately The timing light should indicate only that cylinder's number on the timing wheel, and the number should appear only near the timing pointer If another cylinder's number appears, or the correct number appears continuously around the timing wheelverify correct location of the ignition coil primary lead and spark plug lead, or replace the power pack