2006 Johnson SD 30 HP 4 Stroke Outboards Service Manual, PN 5006592, Page 34Get this manual
INSTALLATION AND PREDELIVERY BOAT RIGGING
Fuel System Requirements
Overview
Fuel systems must meet the minimum specificationsThese requirements must be met to insure the proper delivery of fuel to the outboardThe guidelines established by the ABYC and U.SCoast Guard should always be followed Permanent fuel tanks must be properly vented outside of the hUll Remote fuel tank gas fills must be grounded Permanent fuel tank pickups should have the correct anti-siphon valve installed to prevent fuel flow if leak occurs in the fuel distribution systemRefer to ABYC Standard H-24
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 priming1Arrow indicates direction of fuel flow