1997 Johnson Evinrude "EU" 90 thru 115 90 CV Service Manual, P/N 507267, Page 110Get this manual
Indexing Flywheel, Erratic Ignition Internal power pack problems 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 revolution1Disconnect the spark plug leads and remove all spark plugs
m 2.Slowly, the eraser flywheela by hand, the No.2 spark plug Place end of pencil in turn the clockwise, until the hole
greatest length of the pencil is outside the spark plug holeThis indicates the No.2 piston is near top dead center
3Mark on the flywheel rim, directly across from the timing pointerLabel this mark "No2
4Repeat Steps and for each of the remaining cylinders,