1980 Johnson 4HP Service Manual, Page 33Get this manual
groundenters the No1 ignition coil through the grounded primary winding wire, and then flows through S.C.R #1 to the other side of the capacitorOuring capacitor discharge, flows through the ignition coil primary winding and S.C.R#1 until the capacitor is discharged and S.C.R#1 turns itself offThe capacitor now recharged as described in the capacitor charge circuit flowing through the No1 ignition coil primary winding produces large magnetic field the secondary winding and duces the high voltage to the spark plug, igniting the fuel in the engine cylinderWhen S.C.R #2 is triggered, the capacitor is discharged through the No2 ignition coil priwinding Current flows through S.C.R #2 and returns to the other side of the capacitorThe No2 ignition coil then produces the high voltage to the spark plug to ignite the fuel in the other cylinder Stevens Electro Specialties meter TesterSee Figure 4-5Adapter availabIe from Stevens tro SpecialtiesdOhmmeter and high ohms
VoltElec-
of indicat.i ng low ohms
Jumper Wires (4 required)Jumper leads made as shown in 4-6