Apparatus for feeding fuel to a marine engine

Claim 1

Apparatus for feeding liquified petroleum gas fuel which is gasified and fed to the carburetor of an internal combustion engine comprising a generally annular chamber having an inner wall provided with a plurality of peripherally spaced orifices and connectible to a fuel feed pipe and mountable on the carburetor such that gasified fuel flows through the orifices thereof to the carburetor, a conduit connected to the annular chamber, a branch pipe connected to the conduit to provide a fuel duct from the fuel feed pipe to the conduit, a helical rotary scroll valve located in the conduit to obturate an adjustable proportion of the branch pipe opening into the conduit dependent upon the rotational position of the scroll valve, a radial lever connected to the scroll valve to cause rotary motion thereof, an adjustment means for the area of the annular chamber orifices comprising a slide plate having further orifices corresponding to the chamber orifices and movable to bring the chamber orifices and further orifices progressively into and out of strict register, and means for clamping the slide plate at any required position within its range of movement.