1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 104Get this manual
Troubleshooting Test Equipment
The following equipment is available from various manufacturers to support your ignition and electrical system troubleshootingManufacturer ordering addresses are on the rear inside cover of this manual Stevens NoS21, S13C, or S48 Mercotronic No55-4S or 55-6S
[!] Spark testers
Peak-reading voltmeters Mercotronic No781 Stevens NoCD-77 Electro-Specialties NoPRV-1
r:;l Ohmmeter capable of reading low (RxO.1), medium (Rx100), and high (Rx10K) ranges Mercotronic No700 VOA Stevens NoAT-101
r::-=J Component temperature can affect resistance values at a
rate of 10 ohms per FAll resistance values listed in this manual are correct at room temperature (70 For 21 C)Ignition module load adapter Stevens NoPL-88 Ignition coil terminal extenders Stevens NoTS-77