1991 Johnson/Evinrude EI 60 thru 70 outboards Service Manual, Page 122Get this manual
Indexing Flywheel, Erratic Ignition Internal power pack problems could cause module 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 revolution1Disconnect the spark plug leads and remove all spark plugsf1l 2Place the eraser end of pencil in the No.2 spark plug hole and slowly turn the flywheel by hand in clockwise direction until the greatest length of the pencil is outside the spark plug holeThis indicates the No2 piston is near TDC3Make mark on the flywheel rim directly across from the timing pointerLabel this mark "No2 4Repeat Steps and for each of the remammg cylinders, labeling the marks with the correct cylinder number5Install the spark plugs and spark plug leadsStart the engine in test tank and run the engine at the RPM where the problem exists6Carefully hook an induction timing light to each cylinder, alternatelyThe timing light should indicate that cylinder's number only and the number should only appear near the timing pointer If another cylinder's number appears or the correct number appears continuously around the flywheel, verify wire and pin location on all timer base and power pack connectors, or replace the power pack