1997 Johnson Evinrude "EU" 90 thru 115 90 CV Service Manual, P/N 507267, Page 122Get this manual
STEPRUNNING OUTPUT TEST
1Twist and remove all primary leads from ignition coils
r:rn primaryapoststwist to install Stevens NoT8-77 terminal extenders, or equivalent, on ignition 2Use clockwise coil r:rn to No.1 coil, orangepurpleterminalNo.2 coil, orangegreen leadwire routingConnect orangeblue 3Install primary leads on extendersObserve proper lead to to No.3 coil, and orangepink lead lead
to No.4 coil
INote Route all tester leads so they do not interfere with moving engine parts4Set peak-reading voltmeter to "POS" and "500"
5Connect voltmeter red lead to No1 terminal extenderConnect meter black lead to clean engine ground6Start engine and run under load at RPM where ignition problem exists Meter must show 230 volts or higher7Repeat 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 STEPSENSOR COIL TEST