(2)
Loosen the throttle cable clamp screw (8) and disconnect the throttle cable from the throttle lever (12).
(3)
Remove the air cleaner (par. 105a).
(4)
Loosen the choke cable clamp screw (13) and disconnect the choke cable from the choke lever (14).
(5)
Loosen the fuel line fitting nut and disconnect the fuel line from the fuel filter (9).
(6)
Remove the carburetor mounting screws (6) and lockwashers (5).
(7)
Remove the carburetor (11) and gasket (17).
(8)
Cover the opening in the intake manifold (2) with a clean cloth to prevent the entrance of dirt into the
combustion chambers.
c. Installation
(1) Install the gasket (17) on the carburetor body and attach the carburetor (11) to the intake manifold (2). See
that the mounting holes are properly alined.
(2) Install lockwashers (5) and mounting screws (6) and tighten them evenly and securely.
(3) Connect the throttle cable with the throttle cable clamp screw (8). Tighten the screw securely.
(4) Connect the choke cable with the choke cable clamp screw (13). Tighten the screw securely.
(5) Connect the carburetor control rod with the carburetor throttle lever (12) and tighten the hexagon screw.
(6) Connect the fuel line with the fuel filter (9). Tighten the fuel line nut.
(7) Install the air cleaner (par. 105f).
(8) Start the engine and check the carburetor for proper operation. Inspect the fuel line connection for leaks;
tighten the fuel line fitting nut if necessary. Do not tighten the fitting nut beyond a leakproof fit. Check the
operation of the choke cable, throttle cable, and governor control rod. If the engine operates erratically,
adjust the carburetor.
d. Adjustment (fig. 21).
(1) Main adjustment screw. The main adjustment screw (10) controls the amount of fuel delivered for high-
speed engine operation. Open the throttle about one quarter and turn the adjustment screw (10) clockwise
until the engine speed decreases and the engine starts to miss. This indicates that the engine is not
receiving a sufficient amount of fuel and that the mixture is too lean. Turn the adjustment screw (10)
counterclockwise until the engine reaches its maximum speed and runs smoothly without missing.
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