1977 Evinrude 4HP Outboards Service Manual, PN 5303, Page 34Get this manual
hCrank the engine with the starter rope and tap load button "B When load button "B" is pressed, spark should jump at the gap of the spark tester connected to No2 ignition coil onlySee Figure 4-16If spark occurs at both gaps of the spark tester during this test, replace the power packiReverse the jumper wires on terminals "B" and
POWER PACK OUTPUT TEST aSeparate the three wire connector between the power pack and ignition coilsbInsert jumper between the "C" terminals of both three wire connectorsSee Figure 4-17cConnect the neon tester blue lead to clean engine grounddConnect jumper wire to the neon tester black lead, and insert the jumper wire to terminal "B" in the power pack end of the connectorSee Figure 4-17eSet the neon tester switch to position number 1fWhile holding load button "A" depressedcrank engine with the starter ropeand observe the light in the neon tester
"C" in the power pack end of the four wire connector, and repeat step hto fire No1 ignition coilIf spark occured during each "trigger input test," the sensor coil is defectiveIf there was no spark, or spark occured on one "trigger input test" but not the other, continue the troubleshooting procedure