TM 5-4240-501-148PCARBURETIONOne Piece Flo-JetFig. 77 - Nylon Choke ShaftInspectionReject idle and high speed mixture needles if damaged,Fig. 78. Check float for leakage. If it contains fuel or iscrushed, it must be replaced. Replace float needle, ifworn. If carburetor leaks with new float needle oncarburetors with pressed in float needle seat, refer tonext paragraph.Fig. 78 - Mixture NeedlesReplacing Pressed in Float Valve SeatUse a #93029 self-threading screw or remove one self-threading screw from a #19069 flywheel puller and clamphead of screw in a vise. Turn carburetor body to threadscrew into seat. Fig. 80. Continue turning carburetorbody drawing seat out. Leave seat fastened to screw.Insert new seat #230996 into carburetor body. (Seat hasstarting lead.)NOTE: If engine is equipped with a fuel pump, Install#231019 seat.Fig. 79 - Replacing Float Valve SeatPress new seat flush with body using screw and old seatas a driver. See Fig. 79. Use care to insure seat is notpressed below body surface or improper float to floatvalve contact will occur. Install float needle valve asshown in Fig. 80.Fig. 80 - Float Needle Valve Variations22
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