1993 Johnson Evinrude "ET" 9.9 thru 30 Service Manual, P/N 508282, Page 124Get this manual
Indexing Flywheel, Erratic Ignition Internal ignition module 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 both spark plugsrl 2Place the eraser end of pencil in the No.1 spark plug holeSlowly turn the flywheel by hand clockwise, until the greatest length of the pencil is outside the spark plug holeThis indicates the No1 piston is near top dead center
f21 3Mark on the flywheel