Abstract: A fuel pre-vaporization system for an internal combustion engine comprising a fuel vaporization chamber having a fuel inlet and a vapor outlet. The system further comprises a magnetron for generating microwaves and a microwave absorbing heat transfer medium exposed to the magnetron output and associated with the vaporization chamber in heat communicating relation with the interior of said chamber. A vapor transfer chamber is provided in communication with the vapor outlet of the vaporization chamber for transmitting vapor from the vaporization chamber to the engine.