Dual fuel supply system

A fuel feeding device comprising a housing including a float chamber including float controlled valve means communicable with a source of fuel and operable to control supply of the fuel to said float chamber, a second chamber, duct means extending between said second chamber and said float chamber for supplying fuel to said second chamber from said float chamber, a movable wall located in said second chamber and defining a primer fuel chamber which can be varied in volume and which communicates with said duct means, means adapted for manipulation by an operator and connected to said movable wall for displacing said movable wall to vary the volume of said primer fuel chamber so as to effect fuel flow to and from said primer fuel chamber, check valve means in said duct means permitting fuel flow from said float chamber to said primer fuel chamber and preventing return flow to said float chamber, and an outlet communicating with said duct means between said primer fuel chamber and said check valve means.