2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 201Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 201

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THEORY OF OPERATION

- Intake manifoldFuel pressure regulatorTo MAP sensorOver flow check valveSecondary VST overflow to adaptor plateSecondary VSTLow pressure fuel pumpFuel bypass check v