CARBURETION

TM 5-4240-501-14&P CARBURETION Cross-Over Flo-Jet Inspection Check idle and high speed needle valves for burrs, grooves or bent needle tips. Reject if damaged, Fig. 101. Check float for fuel in float, damage or leaks. If it contains fuel or is crushed it must be replaced. If carburetor leaks with new inlet needle valve, replace inlet needle seat. See next paragraph. Fig. 101 Replacing Pressed-In Float Valve Seat Use a #93029 self-threading screw or remove one self- threading screw from a #19069 flywheel puller and clamp head of screw in a vise. Turn carburetor body to thread screw into seat. Fig. 102. Continue turning carburetor body drawing seat out. Leave seat fastened to screw. Insert new seat #231019 into carburetor body. (Seat has starting lead.) Fig. 102 - Replacing Float Valve Seat Press new seat flush with body using screw and old seat as a driver. See Fig. 102. Use care to insure seat is not pressed below body surface or improper float to float needle valve contact will occur. Install float valve as shown in Fig. 103. Fig. 103 - Float Needle Valve Checking Float Level With float needle valve, float and float hinge pin installed, hold carburetor upside down. The float should be parallel to the bowl mounting surface. If not, bend tang on float until they are parallel. DO NOT PRESS ON FLOAT TO ADJUST, Fig. 104. Fig. 104 - Checking Float Level Repair Carburetor Use new parts where necessary. Always use new gaskets. Old gaskets take a set or harden and may leak. Carburetor repair kits are available, see illustrated parts list for part numbers. These carburetors use a viton tip float needle and a pressed-in needle seat. The seat does not need replacement unless the seat is damaged or leaks with a new float needle. 28