TM 5-3740-214-14
CARBURETOR MAINTENANCE (Continued)
(b)
Check fuel inlet port for blocking.
(c) Check the choke, throttle plates and shafts. If these parts are worn or damaged replace the entire
carburetor.
d. Assemble carburetor.
Figure 5-253. Carburetor Float Adjustment
(1)
Install the seat needle float and pin.
(2) Set the float level. Turn the carburetor upside down and let the float rest on the needle. The clearance
between the machined surface of the carburetor and the free end of the float should be 0.17 inches 0.03 inches (4.32
mm 0.76 mm).
(3)
Adjust the clearance by bending the float tab with a screwdriver if necessary.
(4) Install a new baffle gasket, a new bowl gasket, the fuel bowl and fuel bowl screw and gasket. Make sure the
bowl gaskets seats well.
(5)
Return the carburetor to the engine. Make sure the carburetor to manifold gasket seals well.
(6)
Install main fuel needle valve and idle fuel needle valve.
e. Adjust the needle valves.
(1)
Turn both needle valves all the way to the right (clockwise) until they gently touch bottom.
(2)
Turn the main fuel needle valve to the left (counterclockwise) two full turns.
(3)
Turn the idle needle valve to the left (counterclockwise) 1-1/4 turns.
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