2003 Johnson ST 6/8 HP 4 Stroke Outboards Service Manual, PN 5005471, Page 132Get this manual
POWERHEAD DISASSEMBLYHP Back off valve adjustment nuts and tappet screws while in the unloaded positionUse Tappet Adjustment Tool, PIN 341444, to back off tappet screwsRemove camshaft from the cylinder head
Tappet Adjustment Tool
Pull rocker arm shaft out of cylinder head and remove arms, spacers, and springs
Use Valve Spring Compressor, PIN 341446, to facilitate removal of valves and components Position compressor end on valve face and compressor ring on valve capCompress spring and remove cap, keepers, and springDO NOT compress spring completelyKeep components together and in order for reassembly