1998 Johnson Evinrude "EC" 90, 115 SPL Service Manual, P/N 520209, Page 116Get this manual
STEPSTOP CIRCUIT TEST
Elimination Test
rn 1Disconnect 1-pin Amphenol connector between power pack and key switchfA
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 circuitGo to Ohmmeter TestKey Switch If some spark is present, go to STEPSENSOR COIL TEST If no spark is present, go to STEPCHARGE COIL TEST3Complete all circuits disconnected during this test