2002+ Mercury Mariner 150/175/200 EFI 2-stroke Factory Service Manual, Page 252Get this manual

2002+ Mercury Mariner 150/175/200 EFI 2-stroke Factory Service Manual, Page 252

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FUEL INJECTION

Fuel Gauge ConnectionPressure Test
IMPORTANT: When checking fuel pressure while engine is running, fuel pressure may fluctuateFuel pressure fluctuation [i.e41 to 45 p