1998 Johnson Evinrude "EC" 125C, 130, 200, 225, 250 90 deg LV Service Manual, P/N 520212, Page 145Get this manual
Indexing Flywheel, Erratic Ignition Internal power pack problems or shorted isolation diodes (if equipped) 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
2Place the eraser end of pencil in the No.2 spark plug holeSlowly, turn the flywheel by hand, clockwise, until the greatest length of the pencil is outside the spark plug holeThis indicates the No.2 piston is near top dead center
3Mark the flywheel rim, directly across from the timing pointerLabel this mark "No2