Abstract: The invention provides a carburetor comprising a float chamber, a throat and a fuel duct extending between the chamber and the throat and from which duct, subject to the below, fuel could overflow to the throat on tilting of the carburetor occurring; and wherein the carburetor is characterized in having a weir communicating, on one side, with the float chamber and, on the other side, with fuel collecting means and over which weir fuel can flow on such tilting occurring whereby to at least in part reduce overflow of fuel through said duct to the throat in consequence of such tilting.The carburetor may be made such in initial manufacture or an existing carburetor may be modified.A device for modifying a carburetor is also provided.

Abstract: A fuel control device for internal combustion engines which is located between the fuel pump and carburetor. Consisting of two parts, the first is located adjacent the carburetor inlet and includes a pressure responsive valve to control the fuel pressure from the pump and an overflow outlet to the second part. This second part includes a second pressure responsive valve operating at a pressure above that of the valve in the first part. A line from this second part leads to the inlet side of the fuel pump.