1997 Johnsoon Evinrude "EU" 50 thru 70 3-Cylinder Service Manual, P/N 507266, Page 136Get this manual
STEPPOWER PACK TEST
To prevent accidental starting of engine while testing, twist and remove all spark plug leads
1Twist and remove all primary leads from ignition coils2Connect No.1 ignition coil primary lead to Stevens NoPL-88 load adapter red leadConnect 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 equivalent3Set peak-reading voltmeter to "POS" and "500"
4Connect voltmeter red lead to adapter red lead and meter black lead to clean engine ground