Construction of the Gasoline Engine. 527 



wheel and operate a finger in such a way as to prevent a 

 cliai-iiv bring given to the engine whenever its speed is 

 running too high. As the speed runs up the balls fly 

 apart and this brings the finger C down upon the catch B 



FIG. 257. Pumping mochanlsm for supplying gasoline to gasoline engine. 



which holds the exhaust valve open and prevents the pump 

 being worked. The catch and finger are moro dearly seen 



