Question about 2003 Mercury Mariner

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Carburetor runs too rich

When I start my 1996 Mariner 9.9 hp outboard motor the motor runs very rich and smoke forms while running and the motor stalls soon after. The fuel/oil (50:1) is new and fresh. How do I adjust the carb to make it run leaner? Or is it something else?

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Sounds like you need to get the carburater cleaned and install a new set of spark plugs

Posted on Oct 12, 2010

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