Adjusting a Carburetor Float

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Lurker Carl
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Adjusting a Carburetor Float

Postby Lurker Carl » Fri Mar 30, 2018 7:46 pm

EDIT: Note, according the Service Manual, measurements are made with the gasket removed.

Float height stops the fuel flow into the fuel bowl at a prescribed level by closing the valve. With the gasket installed, invert the throttle body so the float lever rests on the closed valve. Float height is the distance from the surface of the gasket to the highest spot on the float, 1 13/32 (1.4) inches.
001.JPG


The float height is adjusted by gently bending the lever. Do not force the float up or down while installed, the valve will be damaged or the float will break where the lever attaches. Reinstall and measure, do it until it is right.
002.JPG
002.JPG (17.82 KiB) Viewed 3026 times


Turn the throttle body upright so the float hangs. The distance from the gasket to the lowest point on the float will be 1 19/32 (1.6) inches.
003.JPG


The float drop is adjusted by gently bending the tab. The tab controls float drop by wedging against the cage, stopping the float from moving farther down. Do not force the float up or down while installed, you’ll mess up the float height adjustment. Install, measure and bend again until it is right. Check the float height again to insure it is still on the money.
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004.JPG (19.27 KiB) Viewed 3026 times

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005.JPG (20.22 KiB) Viewed 3026 times


Center the float in fuel bowl by gently twisting it left or right while installed on the throttle body. Don’t force the float up or down, you’ll damage it or change the float height or drop.
006.JPG

007.JPG


EDIT: Note, according the Service Manual, measurements are made with the gasket removed. Refer to carburetor float dimensions below.
Carb Float Dimensions.jpg
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