1988 Johnson Evinrude CC 60 thru 75 outboards Service Manual, Page 84Get this manual
3Anti-Siphon Valvesafety standards require permanently installed fuel systems to have anti-siphon protectionThis protection can be afforded in two ways AJJ 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 lnstalledAnti -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 516 in1.0hose PIN 173274 for 3fa in1.0hose PIN 173275 for 3fa in0.0copper 4Fuel Distribution Linesminimum inside diameter of 3fa in(9,5 mm) is required for V6 and larger engines3fa in(9,5 mm) is preferred for V4 and smaller engines, while minimum of 016 in(7,9 mm) is requiredDistribution lines must be USCG Type "A" reinforced neopreneVinyl hose must not be used in permanently installed fuel distribution system5Fuel Distribution Fittingsall fittings must have minimum inside diameter of in(6,4 mm), while 032 in(7,1 mm) is preferred6Fuel Filterfuel filters must have pressure drop of no more than 0.4 inof 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 requirements 7Fuel 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 startingOMC Manual Filter Primer Assembly PIN 377381 is available for engines below 120 HP