1974 Johnson 40 HP Outboard Motors Service manual, Page 79Get this manual

STARTER CIRCUIT TROUBLESHOOTING PLACE VOLTMETER LEAD

IGNSWITCH

CHECK POI NT

ENG'N:'" GROUND

COMMON ENGINE GROUND

SOLENOID SW ITCH

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives