1994 Johnson/Evinrude "ER" 9.9 thru 30 outboards Service Manual, Page 141Get this manual
STEPRUNNING OUTPUT TEST
1Twist and remove primary leads from ignition coils.atwist to install Stevens Instrument NoTS-77 terminal extenders, or equivalent, f1612on Ignition coli primary postsf1613Install primary leads on terminal extendersObserve proper wire routingOrangeblue primary lead must be connected to the No.1 ignition coilNote Route all tester leads so they do not interfere with moving engine partsf1614Connect voltmeter red lead to No.1 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 6Repeat Step for No.2 ignition coil If either cylinder shows less than specified output, test charge coilRefer to STEPCHARGE COIL TEST If charge coil tests good, replace the power pack7Remove terminal extendersInstall ignition coil primary leadsObserve proper wire routingOrangeblue primary lead must be connected to the No.1 ignition coil32;en9