Carburetor and Tank Assembly

TM 5-4240-501-148P CARBURETION Vacu-Jet VACU-JET CARBURETORS Fig. 59 - Vacu-Jet Carburetor Carburetor and Tank Assembly Remove the carburetor and fuel tank as one unit, being careful not to bend the governor linkage or spring. On models equipped with a stop switch, remove the ground wire. After removal of the carburetor from the fuel tank, inspect the tank for deposits of dirt and/or varnish and mounting surfaces. Tank should be cleaned in solvent. Throttle Cast throttles, Fig. 60, Illustration 1, are removed by backing off the idle speed adjusting screw until the throttle clears the retaining lug on the carburetor body. Fig. 61. Stamped throttles, Fig. 60, Illustration 2, are removed by using a Phillips screw driver to remove the throttle valve screw. After removal of the valve, the throttle may be lifted out. Reverse procedure to install. Fig. 62. Illus. 1 Illus. 2 Fig. 60 - Throttle Types Fig. 61 - Removing Old Style Throttles Fig. 62 - Removing and Installing New Style Throttles Fuel Pipe The fuel pipe contains a check ball and a fine mesh screen. To function properly, the screen must be clean and the check ball free. Fig. 63. Replace pipe if screen and ball cannot be satisfactorily cleaned in carburetor cleaner. DO NOT LEAVE CARBURETOR IN CLEANER MORE THAN 1/2 HOUR WITHOUT REMOVING NYLON PARTS. Nylon fuel pipes, Fig. 64, Illustration 1, are remove and replaced with a 9/16" 6 point socket. Fig. 63. Brass fuel pipes, Illus. II, are removed by clamping the pipe in a vise and prying out as shown in Fig. 65. Fig. 63 - Fuel Pipes 18