1992-2000 Mercury Mariner 105-225HP outboards Factory Service Manual, Page 299Get this manual

1992-2000 Mercury Mariner 105-225HP outboards Factory Service Manual, Page 299

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EFI System Test Procedures Fuel Gauge ConnectionPressure Test
If fuel pressure is well below 34 psi (234 kPa), fuel delivery to electric fuel pump, fuel pump failure or other related problem exi