2003 Johnson ST 6/8 HP 4 Stroke Outboards Service Manual, PN 5005471, Page 39Get this manual
INSTALLATION AND PREDELIVERY FUEL SYSTEM REQUIREMENTS
Fuel System Primer
Outboards require priming system capable of refilling the fuel system subsequent to periods of non-use
Fuel Filters
Boat-mounted fuel filters and water-separating fuel filter assemblies must meet the required fuel flow and filter specificationThe filter must be mounted to rigid surface above the "full" level of the fuel tank and accessible for servicing The EvinrudeJohnson Fuel Filter Assembly, PIN 174176, meets all requirements for waterseparating fuel filter
Primer Bulbs
Primer bulbs that meet the outboard's minimum 1.0fuel line requirements are used on most outboardsInstall the primer bulb in the fuel supply hose as follows: The primer bulb should be installed in an accessible location The arrow on the primer bulb must point in the direction of fuel flow The fuel primer bulb must be positioned in the fuel supply hose so the primer bulb can be held with the arrow pointing "up" during primingArrow indicates direction offuel flow