1993 Johnson Evinrude "ET" 60 degrees LV Service Manual, P/N 508286, Page 50Get this manual
3Anti-Siphon Valvesafety standards require permanently installed fuel systems to have anti-siphon protectionThis protection can be afforded in two ways: All fuel distribution lines must be secured above the highest fuel level when the boat is in its normal, unloaded, static floating position Each fuel pickup tube must have an anti-siphon valve installedAnti-siphon valves used must have pressure drop of no more than 2.5 inof mercury (Hg) at flow rate of 20 gallons per hourThe following OMC valves meet this requirement: PIN 173273 for 5116 in1.0hose PIN 173274 for 3a in1.0hose PIN 173275 for 3a in0.0copper 4Fuel Distribution Linesminimum inside diameter of 3a in(9,5 mm) is requiredDistribution lines must be USCG Type "A1" or "B1"Vinyl hose must not be used in permanently installed fuel distribution system5Fuel Distribution Fittingsall fittings must have an inside diameter of 14 in(6,4 mm), while 932 in(7,1 mm) is preferred6Fuel Filterfuel filters must have pressure drop of no more than 0.4 in of mercury (Hg) at flow rate of 20 gallons per hourThe filter should have minimum filtered area of 200 square inches (1290 cm 2) OMC Fuel Filter Kit, PIN 174176, meets these requirements7Fuel System PrimingOMC Electric Fuel Primer Kit, PIN 174651, is available for built-in fuel systemsThe kit mounts near the fuel supply and, when activated, fills the fuel distribution lines and engine fuel system for quicker starting