Mercury Workshop Service and Repair Manuals

Evaporative Check Valve: Specifications

TWO-WAY CHECK VALVE OPERATION 

Vacuum to open valve, port A [1] ..............................................................................................................................................  37 mm Hg (1.46 in Hg)

Vacuum to open valve, port B [2] ..............................................................................................................................................  44 mm Hg (1.73 in Hg)

[1]  Fuel tank pressure

[2]  Barometric pressure