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Glenn C. · 06-03-2010, 10:19 AM

Recently took the Model A for a short drive on a day that was not overly hot. The vehicle has the new modern Zenith carburetor. When I stopped for a vehicle check as this was a new engine, the fuel was perculating in the carburetor. This also happened to us on a high altitude trip on a hot day. Ok! Is perculating and vapor locking the same thing ? An original Zenith carburetor has a vent hole in the top half. Many years ago carbs were made with a perculation valve.

06-03-2010, 10:19 AM	#43
Glenn C. Senior Member Join Date: May 2010 Location: Didsbury Alberta Posts: 838	Re: For vapor lock nonbelievers Recently took the Model A for a short drive on a day that was not overly hot. The vehicle has the new modern Zenith carburetor. When I stopped for a vehicle check as this was a new engine, the fuel was perculating in the carburetor. This also happened to us on a high altitude trip on a hot day. Ok! Is perculating and vapor locking the same thing ? An original Zenith carburetor has a vent hole in the top half. Many years ago carbs were made with a perculation valve.