2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Repair Manual P/N 5005714, Page 204Get this manual

2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Repair Manual P/N 5005714, Page 204

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Running motors too fast (Overspeeding)"
Exhaust gases of running motors contain monoxideYou cannot see it; you cannot smell it; you cannot taste it, but it is there whenever motor is runningand