1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 138Get this manual

1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 138

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FUEL DELIVERY SYSTEM
Rejetting Carburetors for High Altitude
Factory installed main fuel jets are normally adequate for proper performance up to approximately 1524m (5000 ft) above sea lev

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