1993 Johnson Evinrude "ET" 2 thru 8 Service Manual, P/N 508281, Page 115Get this manual
200V DR4257
STEPRUNNING OUTPUT TEST
1Twist and remove primary leads from ignition coilstwist to install Stevens Instrument NoTS-77 terminal extenders, or equivalent, 19l2on Ignition cOil primary posts19l3Install primary leads on terminal extendersObserve proper wiring routingOrangeblue primary lead must be connected to the No.1 ignition coilINotel Route all tester leads so they do not interfere with moving engine parts4Set peak-reading voltmeter to "POS" and "500"19l5Connect voltmeter red lead to No.1 terminal extenderConnect meter black lead to clean engine ground