2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 119Get this manual
POWER UNIT CYLINDER HEADIVALVECAMSHAFT Remove: Rocker arm shaft
Washer (Z) Wave washer Rocker arms (Qty4) Spring NOTE: Install mm bolt into the lower end of the rocker arm shaft and pull out the shaft Reassemble each rocker arm to the original position
Remove: Camshaft