1998 Johnson Evinrude "EC" 25, 35 HP 3-Cylinder Outboards Service Manual, Page 117Get this manual
DRC6001
STEPRUNNING OUTPUT TEST
1Twist and remove primary lead from ignition coil
2Use clockwise twist to install Stevens NoTS-77 terminal extender, or equivalent, to ignition coil primary post3Install primary lead on terminal extender
INote Route all tester leads so they do not interfere with moving engine parts4Set peak-reading voltmeter to "POS" and "500"
5Connect meter red lead to terminal extenderConnect meter black lead to clean engine ground6Start engine and run under load at RPM where ignition problem exists: Meter must show 240 volts or higher If test shows low output, go to STEPCHARGE COIL TEST If test shows no output, go to STEPIGNITION MODULE TEST