2003 Johnson ST 6/8 HP 4 Stroke Outboards Service Manual, PN 5005471, Page 136Get this manual
POWERHEAD DISASSEMBLYHP Loosen clamp and remove oil pickup tube and filterRemove oil pan and gasket from powerhead
Remove two screws retaining the pressure relief valve housingRemove housing
Remove two screws retaining thermostat coverCarefully remove cover and large springDiscard gasketScrews