1999 "EE" Evinrude 5 thru 15 4-Stroke Service Manual, P/N 787022, Page 117Get this manual
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 extende rRoute all tester leads so they do not interfere with moving engine parts