Abstract: A device for creating a magnetic field in a fuel line of a fuel burning apparatus includes a pair of magnets each having a substantially flat north pole and a substantially flat south pole and mounted by a holder on opposite sides of the fuel line with the north pole of one magnet facing the south pole of the other magnet to create a magnetic field between the facing north and south poles, the magnetic field passing through the fuel line. The magnets are mounted so that the north pole and south pole are substantially parallel to one another and to the fuel line. The holder may include magnet brackets mounted on the fuel line by a connector, such as a strap device, extending through the brackets. Spacers can be used on the strap to properly space the magnets so they remain opposite one another.