1992 Johnson Evinrude "EN" 40 thru 55 Service Manual, P/N 508143, Page 140Get this manual
15 DR4256
STEPPOWER PACK OUTPUT TEST
To prevent accidental starting of engine while testing, twist and remove both spark plug leads
1Twist and remove primary leads from ignition coilsf15l 2Connect No.1 ignition coil primary lead to Stevens Instrument load adapter NoPL-88 red leadConnect adapter black lead to clean engine groundIf Stevens Instrument NoPL-88 is not available, you can make an adapter using 10-ohm, 10-watt resistor, Radio Shack No271-132, or equivalent3Set peak-reading voltmeter to "NEG" and "500"4Connect voltmeter red lead to adapter red lead and meter black lead to clean engine ground5Crank engine and observe meter Meter must show 200 volts or higher6Repeat Steps and for No.2 ignition coil primary lead If both primary leads have good output, test ignition coilsRefer to Ignition Coil Tests, Page 3-10 If one primary lead has no output, replace power pack If both primary leads have no output, go to STEPCHARGE COIL TESTIf charge coil tests good, replace the power pack