1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 127Get this manual
STEPSTOP CIRCUIT TEST Elimination Test
f31 1Remove component bracket cover and disconnect stop circuit 1-pin Amphenol connector
'" To avoid possible shock hazard, do not handle ignition coils or spark tester during cranking tests
2Crank engine and observe results at spark tester If spark now jumps alternately at each gap, the problem is in the stop circujtGo to Ohmmeter TestStop Button or Ohmmeter TestKey Switch If there is no spark at one or both gaps, go to STEP IGNITION PLATE OUTPUT TEST