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Old 06-25-2020, 08:59 PM   #14
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Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 5,289
Default Re: Downdraft Carburetor question?

Another thing I have found with the downdraught carb is that in cold conditions, the throat can ice up, especially if there is humidity about, like fog. The car still runs but quite poorly. Diagnosis took some doing but when I worked it out, I smacked my palm on my forehead. My solution has been to use a piece of exhaust pipe, slit it length wise and clamp it over the exhaust manifold and direct the warm air upwards and into the air cleaner. Problem solved!
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