2003 Johnson ST 6/8 HP 4 Stroke Outboards Service Manual, PN 5005471, Page 137Get this manual
POWERHEAD DISASSEMBLYHP Remove vernatherm, small spring, and housingPlace tool on crankshaft taper aligned with keyway and secure in place with the flywheel nutUse crowfoot wrench and remove nut from crankshaft threads
Remove seven screws retaining the intake manifoldRemove manifold and discard gasket
Remove key and nutRemove lock plate and belt guide