A complete repair parts kit is available and recommended when servicing an excessively used or worn unit. Using this kit will guarantee accurate work and performance.

Examine throttle and choke shaft (26) and (38) for excessive wear. Undue wear of throttle shaft and bearings will cause leakage of air resulting in improper idle performance. Throttle shaft bushings (35) can be replaced if necessary.

Check float level as follows:

Assemble parts 10-16 to carburetor bowl cover. Be sure to tighten inlet seat. Turn assembled float upside down. With float lever tang resting on spring so inlet needle is seated, a measurement of 1/64 in. should be maintained from edge of bowl (less gasket) to the top edge of float as shown in Fig. 3F-15.

Figure 3F-15. Float Setting

Obtain correct float level setting as follows:

To raise float, insert finger in float hole and pull carefully with slight pressure on float. To lower float, remove large float bowl plug screw (12, Fig. 3F-14) to uncover float tang. Hold float down and push against float lever tang with screwdriver to bend it.

Always recheck float level after each setting as previously described.


Insert throttle disk in slot in throttle shaft. Make certain that small identifying mark is visible when viewed from manifold end of carburetor and that mark on disk is pointing to the base of carburetor bore. Tighten throttle disc (36) on its shaft after stop and clip are secured in place.

To install choke, first insert choke shaft spring (44) on choke shaft (38). Insert shaft into carburetor body. Put on choke retaining clip (43). Put lockwasher on choke shaft clip screw and screw into place. Check to see that choke shaft spring (44) is correctly attached to lever and shaft of choke. Attach disc on shaft with screws and lockwashers.

To reassemble carburetor reverse the disassembly procedure. Be sure to tighten idle tube (20). Check the float to make sure it moves freely and is set at specified level.

Bolt carburetor to manifold.

After assembly, adjust carburetor as described in "Adjusting Carburetor," "Initial Adjustment."

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