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A heated fuel vaporizer block includes a substantially solid, heated surface onto which liquid gasoline from a carburetor is directed, thereby turning the liquid gasoline into vapor. The fuel vaporizer block includes an opening that does not reduce or constrict the flow of fuel and air between the c

A heated fuel vaporizer block includes a substantially solid, heated surface onto which liquid gasoline from a carburetor is directed, thereby turning the liquid gasoline into vapor. The fuel vaporizer block includes an opening that does not reduce or constrict the flow of fuel and air between the carburetor and intake manifold. The fuel vaporizer block may have a heated surface with a variety of geometrical configurations, including an inclined surface, a concave surface, and a concave surface that includes a plurality of orifices and a plurality of channels for directing fuel into the plurality of orifices. In addition, the heated surface that the fuel strikes may include a platinum coating to reduce emissions and increase the efficiency of the engine. The fuel vaporizer block can be heated using any suitable form of heat, including electrical heating element, engine coolant, exhaust, and automatic transmission fluid. In addition, the heated surface that the fuel strikes may include a platinum coating to reduce emissions and increase the efficiency of the engine. The preferred embodiments include a retrofit kit that allows the fuel vaporizer block to be easily installed on an existing carbureted engine.

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A heated fuel vaporizer block includes a substantially solid, heated surface onto which liquid gasoline from a carburetor is directed, thereby turning the liquid gasoline into vapor. The fuel vaporizer block includes an opening that does not reduce or constrict the flow of fuel and air between the c

A heated fuel vaporizer block includes a substantially solid, heated surface onto which liquid gasoline from a carburetor is directed, thereby turning the liquid gasoline into vapor. The fuel vaporizer block includes an opening that does not reduce or constrict the flow of fuel and air between the carburetor and intake manifold. The fuel vaporizer block may have a heated surface with a variety of geometrical configurations, including an inclined surface, a concave surface, and a concave surface that includes a plurality of orifices and a plurality of channels for directing fuel into the plurality of orifices. In addition, the heated surface that the fuel strikes may include a platinum coating to reduce emissions and increase the efficiency of the engine. The fuel vaporizer block can be heated using any suitable form of heat, including electrical heating element, engine coolant, exhaust, and automatic transmission fluid. In addition, the heated surface that the fuel strikes may include a platinum coating to reduce emissions and increase the efficiency of the engine. The preferred embodiments include a retrofit kit that allows the fuel vaporizer block to be easily installed on an existing carbureted engine. dule for controlling the throttle valve is attached to an inner face of the cover. The throttle position sensor and the electronic control module are contiguous to each other and connected at a position contiguous thereto. The cover is provided with a connector portion for external connection of the electronic control module. A group of lead frames constituting terminals of the connector portion are embedded in the cover. Power source is supplied to a motor via the connector portion for external connection, the electronic control module and intermediary connectors provided at the cover. Thereby, by simplifying the cover for protecting the throttle valve. The motor as a drive source and a power transmission apparatus, electric connection lines and connecting portions are integrally assembled. Thereby a motor driving type throttle apparatus can be integrated to an engine by inexpensive fabrication cost, in a compact and simple style and with high reliability. body to close said opening and having the other half of said partition wall, said lid being made of a light alloy by casting, and a valve bore permitting said first and second dispensing chambers to be put into communication with each other and bearing bores for supporting a valve shaft of said on-off valve for opening and closing said valve bore are defined in the other half of said partition wall,wherein said dispensing box body has one wall disposed proximal to said engine and another wall disposed opposite from said one wall, said first and second intake branch pipes being formed integrally with said one wall and disposed inside said dispensing box body while said opening is formed on said another wall.2. An intake system for a multi-cylinder engine according to claim 1, wherein the other half of said partition wall is divided into a main partition other-half body and a partition piece so that said valve bore is divided along said bearing bores into halves, said partition piece being bolted to said main partition other-half body.3. An intake system for a V-type engine for an outboard engine system, the engine being disposed with a crankshaft placed vertically and with heads of left and right banks directed rearwards, the engine being covered with an engine hood; wherein an intake air inlet is provided in vertically one side of a longitudinally flat intake air-dispensing box disposed between the left and right banks and a rear wall of the engine hood so that said intake air inlet leads to an intake passage in a throttle body; the inside of said intake air-dispensing box is divided by a partition wall into left and right dispensing chambers communicating said intake air inlet, respectively and extending vertically; an on-off valve capable of permitting said left and right dispensing chambers to be put into and out of communication with each other is mounted in said partition wall; left and right intake branch pipes opening into said left and right dispensing chambers respectively and leading to intake ports in said left and right banks respectively are connected to a front wall of said intake air-dispensing box; said intake air-dispensing box is comprised of a dispensing box body which includes said intake air inlet, said left and right intake branch pipes and one of halves of said partition wall, said dispensing box body having an opening provided in its outer wall opposite from said left and right intake branch pipes to extend between said left and right dispensing chambers, and a lid which is made of a light alloy by casting and detachably coupled to said dispensing box body to close said opening and which has the other half of said partition wall; said on-off valve is mounted to a valve shaft rotatably supported in said other half and extending vertically; an operating lever is secured to an outer end of said valve shaft protruding out of toward the vertically other end of said intake air-dispensing box; and an actuator for turning said operating lever to open and close said on-off valve is mounted at said other end of said intake air-dispensing box and accommodated within an area of a vertically projected view of said intake air-dispensing box,wherein said dispensing box body has one wall disposed proximal to said rear wall of the engine and another wall disposed opposite from said one wall, said first and second intake branch pipes being formed integrally with said one wall and disposed inside said dispensing box body while said opening is formed on said another wall.4. An intake system for a V-type engine for an outboard engine system according to claim 3, wherein the other half (35b) of said partition wall divided into a main partition other-half body and a partition piece so that said valve bore is divided along said bearing bores into halves, said partition piece being bolted to said main partition other-half body.5. An intake system for a V-type engi