1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 113Get this manual

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Acceleration Pump Circuit Operation Four Cylinder Engines ACCELERATOR PUMPReceives pressurized fuel from T-fitting in fuel line between #1 and #2 carburetorsPump is actuated by throttle camPumps to tw

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