Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 78Get this manual

Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 78

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Testing Fuel Pumps Maximum Fuel Pump Pressure at Wide Open hrottle: 6-8 PSI Minimum Fuel Pump Pressure at Wide Open hrottle: PSI fuel Pressure at Idle PSI Electric Fuel Pump Pressure, if Used Must be