1989 Johnson Evinrude "CE" Colt/Junior thru 8 Service Manual, P/N 507753, Page 112Get this manual
Troubleshooting Test Equipment
The following equipment is available from various manufacturers to support your ignition and electrical system troubleshooting Manufacturer ordering addresses are on the rear inside cover of this manual
[!] Spark testers
Stevens NoS21, S13C, or S48 Mercotronic No55-4S or 55-6S
Peak-reading voltmeters Mercotronic No781 Stevens NoCD-77 Electro-Specialties NoPRV-1