1968 Evinrude Starflite 100 HP outboards Service Manual, Page 35Get this manual
6PULSE PACKaConnect low reading ammeter between white with red stripe and red lead from voltage suppressorReading should be .4 to .5 amp with key on and pressing on vacuum switch diaphragm to close circuit (do not crank engine)See Figure 4-8.4AMP READING
Figure 4-6Checking Spark
transformer, it should be replaced to determine if it is the source of the trouble5VOLTAGE SUPPRESSORVoltage suppressor is to protect pulse pack from high voltage caused by loose connectionsTo test, connect ohmmeter between input and output leads of suppressorSee Figure 4-7Meter should read 12 ohm on Lo Ohms scaleTo check suppressor diode, connect test meter black lead to ground and other lead to output terminal lead to pulse packNote High Ohms scale meter reading, then reverse leads or press polarity switch and again note meter readingA normal diode will show reading in one direction, and no reading in the other directionIf the diode does not pass this test, the voltage suppressor must be replaced