2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 28Get this manual
PERIODIC MAINTENANCE ENGINE OIL ENGINE OIL FILTER 4To completely drain oil from the engine, tilt up the outboard motor fully, then turn it to starboard5Tilt the outboard motor down
6Install new gasket and oil drain plugTighten engine oil drain plug to specified torque
Engine oil drain plug: 13 Nm (1.3 kg-m, 9.5Ib-ft)