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A gasoline preheater has a hot fluid chamber, preferably a hot water chamber, with an inlet and outlet. A gasoline chamber is disposed in heat exchanging contact with the hot fluid chamber, and also has an inlet and outlet. A thermostat has a heat sensing element in communication with the gasoline c

A gasoline preheater has a hot fluid chamber, preferably a hot water chamber, with an inlet and outlet. A gasoline chamber is disposed in heat exchanging contact with the hot fluid chamber, and also has an inlet and outlet. A thermostat has a heat sensing element in communication with the gasoline chamber. The thermostat also has a valve element communicating with the hot fluid chamber. The foregoing arrangement is so as to allow an increased hot fluid, usually hot water from a hot water cooling system of a typical gasoline engine, to flow through the hot fluid chamber in response to a decrease in temperature of gasoline in the gasoline chamber. The gasoline preheater is used in combination with a gasoline engine having a hot fluid system, typically a hot water cooling system, a carburetor, and a source of pressurized fuel, typically a fuel pump.

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A gasoline preheater, comprising (a) a hot fluid chamber having an inlet and outlet; (b) a gasoline chamber in heat exchanging contact with said hot fluid chamber, and having an inlet, an outlet, and an access port therein; (c) a thermostat having: (i) a housing with a valve member bore extending th

A gasoline preheater, comprising (a) a hot fluid chamber having an inlet and outlet; (b) a gasoline chamber in heat exchanging contact with said hot fluid chamber, and having an inlet, an outlet, and an access port therein; (c) a thermostat having: (i) a housing with a valve member bore extending therethrough, and a hot fluid passage extending therethrough which intersects the valve member bore and communicates with said hot fluid chamber; (ii) a valve member disposed within the valve member bore and slidable therein between a fully closed position blocking the hot fluid passage, and a fully open position not substantially blocking the hot fluid passage; (iii) a heat sensing element releasably mounted on the housing so as to be removable therefrom through the access port in the gasoline chamber, and communicating with said gasoline chamber and said valve member so as to reversibly move the valve member toward the fully closed position and allow decreased hot fluid flow through the hot fluid bore and into the hot fluid chamber, in response to an increase in gasoline temperature in said gasoline chamber.