1997 Johnson Evinrude "EU" 125C, 130, 200, 225, 250 90 LV Service Manual, P/N 507269, Page 156Get this manual
STEPRUNNING OUTPUT TEST
1Twist and remove all primary leads from ignition coils
2Use clockwise twist to install terminal extenders, Stevens NoTS-77 or equivalent, on ignition coil primary posts3Install primary leads on terminal extendersmovi ng eng ne parts
INote Route aII tester leads so they do not interfere with
4Set peak-reading voltmeter to "POS" and "500"
5Connect voltmeter red lead to No.1 terminal extenderConnect meter black lead to clean engine ground