The manifold gets cold because heat is removed from the air to vaporize the gasoline. Your carburetor has a Venturi in it, this is there to increase the velocity of the incoming air and thereby pull a mist of gasoline into the air. As that mist vaporizes, the manifold will get cold. This is perfectly normal,and expected. Some of the larger gas tractors will actually ice over the outside of the manifold and carburetor in the right conditions. -Andy
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Today's Featured Article - Horsepower Defined - by Staff. Indicated Horsepower This represents the power developed in the enine cylinder as obtained from the pressure in the cylinders. This is pressure obtained from an indicator which shows cylinder pressures. Indicated horsepower does not represent the actual useful power delivered by the engine. Brake Horsepower This is the actual horse power delivered by the engine to the shaft. It is equal to the "indicated horsepower" less the friction of the engine. It is useful hor
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