Mercury Mariner Outboard 40/50/55/60 2-stroke Service Manual, Page 139Get this manual

Mercury Mariner Outboard 40/50/55/60 2-stroke Service Manual, Page 139

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High Altitude Jet Chart Factory installed main fuel jets are normally adequate for proper performance up to approximately 5000 feet (1524m) above sea levelBetween 2000 feet (609.6m) and 5000 feet (152