1997 Johnson Evinrude "EU" 40 thru 55 2-Cylinder Service Manual, P/N 507265, Page 123Get this manual
Indexing Flywheel, Erratic IgnitionAll Models Internal power pack problems could cause 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
1Disconnect the spark plug leads and remove all spark plugsthe No.2 spark plug clockwise, until the spark plug holeThis center
2Place the eraser end of pencil in holeSlowly turn the flywheel by hand greatest length of the pencil is outside the indicates the No.2 piston is near top dead
3Mark on the flywheel rim directly across from the timing pointerLabel this mark "No.2"