Figure 7-I. Carburetor, assembly and disassembly.

Figure 7-I. Carburetor, assembly and disassembly.

shaft buildings will allow dirt or grit to pass into the engine and result in excessive wear of the rings, pistons, and

cylinders.

i. Inspect the vacuum pump cylinder, located in the fuel bowl, for excessive wear or deep scratches. Reassemble

the vacuum pump into the vacuum pump cylinder. Inspect the clearance at the lower operating end. Desirable

clearance is 0.001 inch. Maximum allowable clearance is 0.003 inch. Clearance in excess of 0.003 inch will reduce

accelerating pump discharge and result in poor acceleration.

j. Inspect all parts for pitts, burrs, and excessive wear.

k. Replace all defective parts.

l. Replace all gaskets and fiber washers.

m. Replace an unserviceable carburetor.

n. Adjust the carburetor after installation (para 3-40).

7-2