1978 Johnson 55 HP Outboards Service Manual, Page 40Get this manual
dTest the Complete SystemThere may be occasions when more than one component is defectiveIf this condition is undetected, repeated ignition system failure may occur, or damage to replacement parts could resultTest everything TEST EQUIPMENT REQUIRED aSpark tester with the air gap adjusted to 12 inch (12.7 mm)bNeon test lightModel M-80 or S-80 with 1-12 volt battery adapter, or Model M-90 (no adapter required) or Stevens or Electro Specialties C.DVoltmeter TesterSee Figure 4-6cOhmmeterCapable of indicating low ohms (RX1) and high ohms (RXI,OOO)dJumper Wires (4 required)Jumper leads can be made as shown in Figure 4-71Four wire connector 2Three wire connector 3Connector retainers Figure 4-8Connector Plug Location
bPlace the connector against the edge of flat surface, and allow clearance for the terminal to be removedcSelect the proper removal tool for the terminal in the connectorSee Figure 4-9
No16 wire, inches (200 mm) long Pin OMC Part No511469 Socket OMC Part No581656 Tubing OMC Part No510628 one inch (25 mm) long