1996 Johnson Evinrude "ED" 60 LV 90, 115, 150, 150C, 175 Service Manual, P/N 507127, Page 130Get this manual
1 DR4127A
STEPRUNNING OUTPUT TEST
1Remove ignition cover2Twist and remove primary leads from ignition coils[] 3Use clockwise twistto install Stevens Instrument NoTS-77 terminal extenders, or equivalent, to ignition coil primary posts[] 4Install primary leads on terminal extenders
INote Route all tester leads so they do not interfere with moving engine parts5Set peak-reading voltmeter to "POS" and "500"[] 6Connect meter red lead to No.1 terminal extenderConnect meter black lead to clean engine ground7Start engine and run under load at RPM where ignition problem existsMeter must show 130 volts or higher8Repeat Steps and for remaining cylinders: If one or more cylinders show low output, go to STEPCHARGE COIL TEST If one or more cylinders show no output, go to STEPPOWER PACK TEST9Remove terminal extendersInstall ignition coil primary leadsObserve proper wire routing and ignition timing