GAS, OIL AND ALCOHOL ENGINES 



the feed pipe, he will set his 

 valve so that the engine 

 runs well under a full load, 

 but when the load becomes 

 less fewer charges will be 

 drawn in and the pump will 

 throw the same amount of 

 gasoline. Consequently the 

 reservoir will fill so full 

 that when the engine does FIG. 304 FLOAT FEED CARBURETOR 

 take a charge there will be so much gasoline in it 

 that there will not be complete combustion, and as a 

 result the explosion will be weak and the exhaust gas 

 will be black smoke. The carburetor should be near the 

 cylinder to enable the mixture to be easily controlled. 

 561. Igniters. There are two general types of ignitors, 



FIG. 305 PRINCIPLE OF THE FLOAT-FEED CARBURETOR 



