1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 143Get this manual
STEPPOWER PACK TEST
To prevent accidental starting of engine while testing, twist and remove all spark plug leads
1Twist and remove all primary leads from ignition coils1141 2Connect No.1 ignition coil primary lead to Stevens Instrument load adapter NoPL-88 red leadConnect adapter black lead to clean engine ground
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
11 14Connect PRV meter red lead to adapter red lead and meter black lead to clean engine ground5Crank engine and observe meter Meter must show 150 volts or higher6Repeat Steps thru for remaining ignition coil primary leads If all primary leads have good output, test ignition coilsRefer to Ignition Coil Tests, Page 3-10 If one primary lead has no output, replace power packRefer to Ignition Component Replacement, Page 3-187Remove PL-88 load adapter and install ignition coil primary leadsObserve proper wire routing and ignition timingRefer to Page 3-18E 0