2004 SR Johnson 2-stroke 40, 50HP Service Manual, Page 121Get this manual
IGNITION IGNITION SYSTEM TESTS
Charge Coil Tests
Voltmeter Ground Test
Disconnect 5-pin Amphenol connectorSet peak-reading voltmeter to POS500Alternately, connect voltmeter between charge coil terminals listed and clean engine groundCrank engine and observe meter at each connection
If wiring and connector condition is good, go to Ohmmeter Continuity Test
Terminal Locations
4Amp "A,""O" 12Amp "A,"U8"
Any reading on either test indicates charge coil or leads are grounded Locate and repair ground, or replace charge coil If no reading is indicated, go to Voltmeter Output Test
Ohmmeter Continuity Test IMPORTANT: All ohmmeter tests must be performed with the engine NOT runningInsert jumper wires in charge coil terminals listed