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Old 09-12-2019, 01:36 PM   #7
keith oh
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Join Date: May 2010
Location: Millersport, central ohio
Posts: 661
Default Re: Sudden Drop in Gas Mileage

Any obstruction of the air filter such as dirt, or the wrong filter will affect mileage. Even a worn choke butterfly bearing surface can cause air flow obstruction. Also make sure the choke butterfly is opening completely vertical. these simple problems are often overlooked.
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