1994 Johnson Evinrude "ER" 90 LV 120 thru 140, 185 thru 225, 250, 300 Service Manual P/N 500612, Page 148Get this manual
Output Tests120, 140, 125WT, ES ill plugs installed and torqued in the cylinder headIf necesAll cranking output tests must
shock hazard, do not handle ignition coils 3If equipped, install the emergency stop switch clip and lanyard assemblyCrank
the engineSpark should jump each tester gap alternately Iftester shows good output on all cylinders, go to STEPRUNNING OUTPUT
TEST If tester shows good output on at least one cylinder, go to STEPSENSOR COIL TEST If tester shows no output, go to STEPSTOP
CIRCUIT TEST4Refer to Troubleshooting Sequence Chart Page 3-28Start with your specific fault symptom and continue troubleshooting
in sequenceIt is possible for the ignition system to have problem but still produce good outputIf the engine "pops" or "backfires"