1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 141Get this manual
15 DR4256
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 No1 ignition coil primary lead to Stevens Instrument load adapter NoPL-88 red leadConnect adapter black lead to clean engine groundIf Stevens Instrument NoPL-88 is not available, you can make an adapter using 10-ohm, 10-watt resistor, Radio Shack No271-132, or equivalent
3C.onnect peak-reading voltmeter red lead to adapter red lead and meter black lead to clean engme ground