2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 67Get this manual

IGNITION AND ELECTRICAL TESTING IGNITION SYSTEM COl UNIT IGNITION COIL
Ignition coil Spark plug cap

COl unit

Neutral switch

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