1992 Johnson Evinrude "EN" 40 thru 55 Service Repair Manual, P/N 508143, Page 129Get this manual
Quality of the image is intentionally reduced!
7 STEPIGNITION PLATE OUTPUT TEST
3 Set peak-reading voltmeter to "POS" and "500"
Connect voltmeter red lead to adapter red lead and meter black lead to clean engine ground
5 C