Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 276Get this manual
ELEC CHAPTER ELECTRICAL
ELECTRICAL COMPONENTS .8-1 WIRING DIAGRAM8-2 ELECTRICAL ANALYSIS .8-3 INSPECTION 8-3 Digital circuit tester .8-3 Peak voltage measurement 8-3 Peak voltage adaptor 8-3 IGNITION SYSTEM .8-5 WIRING DIAGRAM 8-5 SERVICE POINTS.8-6 IGNITION SPARK GAP 8-6 IGNITION SYSTEM PEAK VOLTAGE 8-7 Ignitor ass'y coil resistance 8-7 SPARK PLUG8-8 SPARK PLUG CAP .8-8 ENGINE STOP SWITCH.8-9