2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Repair Manual P/N 5005714, Page 76Get this manual
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IGNIION AND ELECTRICAL ELECTRIC STARTER SYSTEM
Digital tester Tester selector: +1 Tester probe connection
YellowGreen Clutch: FORWARDInfinity REVERSEInfinity NEUTRALContinuit