TM 5-4240-501-14&PUnits equipped as per Fig. 114 and Fig. 115, close fuelfilter valve and open bleed screw in needle valve to drainthe carburetor. Close bleed screw. Remove wing plug tofill fuel line and carburetor with gasoline. Combinationfuel tank units, Fig, 112 and Fig. 108, open gasolineshut-off valve "A," and close kerosene shut-off valve "B"two or three minutes before shutting off engine. This willstop the flow of kerosene to the carburetor, and willadmit gasoline to the carburetor.Fig. 114 - Kerosene Fuel SystemFig. 115 - Kerosene Fuel SystemFuel Pumps(Crankcase Vacuum Operated)Some models are factory or field equipped with fuelpumps operated by crankcase vacuum. Fuel pumpsmay be mounted directly to the carburetor or on amounting bracket, Fig. 116 or Fig. 117. Crankcasevacuum is obtained by a fitting on the dipstick tube, Fig.118, a hollow bolt and fitting, Fig. 117, or from thecrankcase breather valve, Fig. 116.CARBURETIONFuel PumpsFig. 116 - Pump on Carburetor,Breather Valve VacuumFig. 117 - Pump on Bracket,Vacuum thru Hollow BoltFig. 118 - Vacuum from Dipstick Tube33
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