2003 Johnson ST 55 HP WRL 2 Stroke Commercial Service Manual, PN 5005483, Page 75Get this manual
IGNITION TEST EQUIPMENT
TEST EQUIPMENT
General Information
Many ignition testers are available from various manufacturersIn addition, some automotive testers having the proper specifications can be usedDetailed instructions for the use of any tester are provided with the unit, therefore, only general information is given hereRefer to the manual of the ignition tester being used for coil specificationsSpecifications will vary among testersIgnition coils must be removed from the powerhead for power and leakage testing
Peak-reading Voltmeters
Peak-reading voltmeters are used to measure power pack output to ignition coils Various models available: Stevens Number CD-77 Merc-O- Tronic Number 781 Electro-Specialties Number PRV-1