2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Repair Manual P/N 5005714, Page 29Get this manual
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PERIODIC MAINTENANCE GEAR OIL
Use 772269 metric thread adapterGear oil amount: 170 ml (5.76.0 US Ilmpoz)
Oil drain plug
Recommended oil: Ultra HPF Gearcase Lubricant (P