. Farm machinery and farm motors. and carries it on into the engine with the air passes the tube D at a velocity of about 6,000feet a minute, it immediately atomizes the gasoline and formsit into a gas. Fig. 303 is a commercial carburetor wherein the gasoline is kept at aconstant level in the reser-voir. Fig. 304 shows afloat-feed carburetor, theprinciple of which is illus-trated in Fig. 305. As fastas gasoline is taken fromthe tube A the float Bdrops and more gasolineenters the reservoir C. The charge of gasolinetaken into the engine eachtime is so small that theamount can be reg
. Farm machinery and farm motors. and carries it on into the engine with the air passes the tube D at a velocity of about 6,000feet a minute, it immediately atomizes the gasoline and formsit into a gas. Fig. 303 is a commercial carburetor wherein the gasoline is kept at aconstant level in the reser-voir. Fig. 304 shows afloat-feed carburetor, theprinciple of which is illus-trated in Fig. 305. As fastas gasoline is taken fromthe tube A the float Bdrops and more gasolineenters the reservoir C. The charge of gasolinetaken into the engine eachtime is so small that theamount can be regulatedonly by a needle valves as are usedabout the pimip are far FIG. 303-CONSTANT-LEVEL CARBURETOR ^^^ ^^^^^ j^ j^ ^j^^ ^^^^ to this minuteness of the charge that the gasoline has to bekept at a constant level in the reservoir of the instance, if the carburetor illustrated in Fig. 303 has nooverflow, but the attendant endeavors to regulate the amountof gasoline in the reservoir by means of the valve in. GAS, OIL AND ALCOHOL ENGINES the feed pipe, he will set hisvalve so that the engineruns well under a full load,but when the load becomesless fewer charges will bedrawn in and the pump willthrow the same amount ofgasoline. Consequently thereservoir will fill so fullthat when the engine does fig. 304—float feed carbx;retortake a charge there will be so much gasoline in itthat there will not be complete combustion, and as aresult the explosion will be weak and the exhaust gasMjiU be black smoke. The carburetor should be near thecylinder to enable the mixture to be easily Igniters.—There are two general types of ignitors.
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