1995 Johnson Evinrude "EO" 9.9 thru 30, 2-Cylinder Service Manual, P/N 503146, Page 132Get this manual
STEPRUNNING OUTPUT TEST
1Twist and remove primary leads from ignition coilstwist to install Stevens Instrument NoTS-77 terminal extenders, or equivalent, '161 2.l!se .aon Ignition cOil pnmary posts'161 3Install primary leads on terminal extendersObserve proper wire routingOrangeblue primary lead must be connected to the No.1 ignition coil
INotel Route all tester leads so they do not interfere with moving engine parts'16l 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: Models 9.915 20 thru 30 Voltmeter "NEG", 500 "POS", 500 Output 200 200