1998-2006 Yamaha F20/F25 Outboards Service Manual, Page 355Get this manual
CHAPTER ELECTRICAL SYSTEM ELECTRICAL COMPONENTS 8-1 (Front and rear views) 8-1 (Port side view) 8-2 (Starboard side view) 8-3 WIRE HARNESS (MH) 8-4 WIRING DIAGRAM 8-4 WIRE HARNESS (EH) 8-5 WIRING DIAGRAM 8-5 WIRE HARNESS (EHT) 8-6 WIRING DIAGRAM 8-6 WIRE HARNESS (E) 8-7 WIRING DIAGRAM 8-7 WIRE HARNESS (ET) 8-8 WIRING DIAGRAM 8-8 ELECTRICAL ANALySiS 8-9 INSPECTION 8-9 Digital circuit tester 8-9 Peak voltage measurement 8-9 Peak voltage adaptor 8-9 Test harness (for the pulser coil and stator coil) 8-10 IGNITION SySTEM 8-11 IGNITION SPARK GAP 8-12 IGNITION SYSTEM PEAK VOLTAGE 8-13 SPARK PLUG 8-14 SPARK PLUG CAP 8-14 ENGINE STOP SWITCH (MH, EH, EHT) 8-14 IGNITION CONTROL SySTEM 8-15 PULSER COIL 8-16 OIL PRESSURE SWiTCH 8-16 ENGINE TEMPERATURE SENSOR 8-16 LOW-OIL-PRESSURE WARNING LAMP 8-17