1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Manual, Page 130Get this manual
STEPPOWER PACK OUTPUT TEST
To prevent accidental starting of engine while testing, twist and remove both spark plug leads
1Twist and remove primary leads from ignition coils2Connect No.1 ignition coil primary lead to Stevens NoPL-88 load adapter red lead Connect adapter black lead to clean engine ground
INote If Stevens NoPL-88 is not available, you can make an adapter using 10-ohm, 10-watt resistor,
Radio Shack No271-132, or equivalent