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Here are examples of open and closed cell cork. I have always found open cell cork floats in the fuel systems that had cork for a float. I don’t know what the reason could be. An internet search of closed cell cork indicate “its closed cell structure makes it very resistant to absorption of liquid. Because of that resistance, a cork will float in gasoline”. So I’ve added some to my experiment.
A "Boathouse Repair" is one that done without having tools or the skills to do it properly.
Open cell cork is “natural” cork,closed cell cork is a mixture of small pieces of natural cork mixed with rubber.If the rubber is ethanol resistant,then the cork should hold up in the gas.Tubs long running experiment will answer the question.
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At some point, when I begin this experiment it was stated that there is an open cell cork, and a closed cell cork. I assumed that was correct. Doing a more thorough investigation has reveled there is only one cork product. Its sold in two forms. The natural form or compressed granules. The granules can be in different sizes, held together with a binder. The size and binder varies with application. “The cells that make cork float are microscopic, irregularly shaped, thin-walled, and wax-coated.” Its the same cells in both variations that make cork float. Its easy to tell the difference as in the sample I’ve added above. I don’t know how often compressed cork would be used as a float for gasoline because of the risk of the binder failing. I checked and my compressed cork example is still floating. I’m curious to see if it will survive, but what every the result, I don’t think it would apply to our carburetor floats. A "Boathouse Repair" is one that done without having tools or the skills to do it properly.
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