2002/2003 Johnson SN/ST 2 Stroke 3.5, 6 8 HP Outboards Service Repair Manual, PN 5005466, Page 56Get this manual
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MAINTENANCE FUEL SYSTEM
Fuel Filter
Johnson outboards are equipped with serviceable filter elementClean or replace the element as neededRefer to FUEL FILTER SHUT-OFF VALVE3.5 and FUEL FILT