1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 105Get this manual
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Specification SheetWME Carburetors Carburetor Number Stamped at TOP of carburetor mounting flange
FUEL PUMP PRESSURE:
Engine Side at W.O.TSEALANTS:
4-6 psi(depending on