1987 Johnson/Evinrude CU Outboards 35A thru 55 Service Manual, Page 134Get this manual

Troubleshooting Test Equip'mentC.DIgnition Systems [11Spark Tester Stevens Model S21 or 13C Merc-O-Tronic Model 55-4S or 55-6S
I-il 2C.DVoltmeter

Stevens Model CD77

Merc-O-Tronic Model 781 Electro-Specialties Model PRV-1

3 Ohmmetercapable of indicating low ohms (Rx1and high ohms (Rx1 0,000)
'4l 4Jumper wires (four required)jumper leads can be made L!I as shown:

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