1997 Johnson/Evinrude EU 25, 35 HP 3-Cylinder outboards Service Manual, Page 119Get this manual
1 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
Note Route all tester leads so they do not interfere with moving engine parts4Set peak-reading voltmeter to "POS" and "500"