2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Repair Manual P/N 5005714, Page 37Get this manual

2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Repair Manual P/N 5005714, Page 37

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PERIODIC MAINTENANCE IGNIlON TIMING
WATER PUMP WATER PUMP IMPELLER
WATER PUMP IMPELLER REPLACE EVERY 200 HOURS (12 MONTHS)
Inspect water pump impellerReplace if vanes

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