Tamper resistant idle adjustment screw

Claim 1

In a carburetor for an internal combustion engine, the carburetor having two air passages and two idle speed fuel circuits, each fuel circuit respectively supplying fuel to one of the air passages to mix with air and form a mixture combusted in the engine, an adjustable idle screw for each idle fuel circuit for respectively varying the quantity of fuel drawn through each idle fuel circuit and thus the fuel to air ratio of the mixture produced, the improvement comprising means for making the idle adjustment screw tamper resistant after an initial adjustment of the screw has been made, said means comprising a cover attachable to the carburetor, the cover enclosing both idle adjustment screws when installed on the carburetor, the cover being U-shaped with a base section and two side arms, the forward end of each side arm abutting the body of the carburetor when the cover is attached thereto and the base section having a central portion of lesser height than the outer portions of the base section and a tang extending inwardly from this central portion, the tang being attached to the carburetor.