1978 Evinrude Outboards 9.9/15HP Service Manual, Page 41Get this manual
Jumper wires Blue tester lead Battery adapter Black tester lead Position No.3
Tap button "B" TerminalA" Terminal "B" Terminal "C" Terminal "D"
Figure 4-24Trigger Input Test 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 4-25cConnect 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 4-25eSet the neon tester switch to position number 1fWhile holding load button "A" depressed, crank engine with the starter rope, and observe the light in the neon tester