1993 Johnson Evinrude "ET" 40 thru 55 Service Manual, P/N 508283, Page 143Get this manual
STEPRUNNING OUTPUT TEST
1Twist and remove primary leads from ignition coilsf16l 2.atwist to install Stevens Instrument NoTS-77 terminal extenders, or equivalent, on Ignition cOil primary postsf16l 3.lnstall 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 partsf16l 4Connect 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 40RS,45,55 40RE,BA 12 Amp 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 coilVoltmeter "NEG," 500 "POS," 500 "POS," 500 Output 200 200 250