1996 Johnson Evinrude "ED" 9.9 thru 30 2-Cylinder Service Manual, P/N 507122, Page 131Get this manual
STEPRUNNING OUTPUT TEST
1Twist and remove primary leads from ignition coilsf161 2.atwist to install Stevens Instrument NoTS-77 terminal extenders, or equivalent, on Ignition coli pnmary posts1.J6l 3Install primary leads on terminal extendersObserve proper wire routingOrangeblue primary lead must be connected to the No.1 ignition coilINotel Route all tester leads so they do not interfere with moving engine partsf161 4Connect voltmeter red lead to No1 terminal extenderConnect meter black lead to clean engme ground5Adjust voltmeter to setting listed in following chartStart engine and run it under load at RPM where ignition problem existsMeter must show at least: