2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 69Get this manual

2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 69

IGNITION AND ELECTRICAL BATTERY CHARGING SYSTEM CHARGING SYSTEM BATTERY CHARGE COIL COIL OUTPUT Measure: Coil output

Peak Voltmeter Stevens CD77 Tester selector: POS 50

1Disconnect rectifier2Remove all spark plugsTester probe connection (Red) (Black) Yellow Red 3Crank the recoil starter
Coil output; Red Yellow 3.5V or over If out of specificationReplaceCOIL RESISTANCE Measure: Coil resistance :

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