2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 147Get this manual
POWER UNIT CYLINDERCRANKSHAFTPISTON InstallOil seals
IACAUTION I
Do not re-use oil seal removedBe sure to use new oil sealMoly Lube
Install the oil seal with springlipped side facing inwardApply Moly lube to the oil seal lip
Install :
Crankshaft
When installing the crankshaft into the cylinder, be sure to fit the oil seal tab in the groove of the cylinder