Carburetor and Tank Assembly

TM 5-4240-501-148P CARBURETION PULSA-JET PULSA-JET CARBURETORS Fig. 41 - Pulsa-Jet Carburetor Carburetor and Tank Assembly Remove the carburetor and fuel tank as one unit, being careful not to bend the governor linkage. On models equipped with a stop switch, remove the ground wire. Fig. 42. Fig. 42 - Removing Ground Wire After removal of the carburetor from the fuel tank, inspect the tank for deposits of dirt and/or varnish. Throttle Cast throttles, Fig. 43, Illustration 1, are removed by backing off the idle speed adjustment screw until the throttle clears the retaining lug on the carburetor body, Fig. 44. Stamped throttles, Fig. 43, Illustration 2, are removed by using a Phillips screw driver to remove the throttle valve and screw. After removal of the valve, the throttle may be lifted out, Fig. 45. Reverse procedure to install. Fig. 44. Fig. 43 - Throttle Types Fig. 44 - Removing Cast Throttle Fig. 45 - Removing Stamped Throttle Some carburetor models have a spiral in the carburetor bore. To remove, fasten carburetor in a vise with smooth jaws about half an inch below top of jaws. Grasp spiral firmly with a pair of pliers, as shown, Fig. 46. Place a screw driver under ledge of pliers. Using edge of vise, push down on screw driver handle to pry out spiral, Fig. 46. Inspect gasket surface of carburetor. Repair if mounting surface is damaged. When inserting spiral, top must be flush to 1/32" (.8 mm) below carburetor flange, and spiral parallel with fuel tank mounting surface, Fig. 46. 14