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ORDERING & QUESTIONS
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Gasoline is stored in the float bowl as a liquid. When the engine is running, the fuel is used from the bowl and a chamber that connects to a port outside the carburetor to unfiltered "dirty" air allows the air to equalize in the bowl. Especially when engines run out of fuel, unfiltered air with any dust or dirt is drawn in through this port. This unfiltered air enters the float bowl and is later drawn into the engine which can cause engine damage.
Click on these examples of "Dirty Ports" from a few famous brands of carburetors to see their location:
The first two are marked at the area of the dirty port. We didn't mark the third one. See if you can figure out where it might be.
Click here for the correct answer: Carburetor 3 Dirty Port
To find the "Dirty Port" on your carburetor, it will usually be noticeable by a buildup of unexplainable dirt as shown on the untouched photo number 1 which is of a used carburetor. Photos 2 and 3 are brand new carburetors.
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US Carburetion Kit Center
416 Main Street * Summersville * West Virginia * 26651
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