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Holley Tuning Part 3

*Note* You may find the screws will be anywhere from 3/4 to 1 & 3/4 turns out once you are finished with the adjustments. This is considered the normal adjustment “window”. If smooth operation can not be achieved within this range, please contact me for further instructions.

Holley Carburetor float adjustment

To adjust float settings (carburetors with externally adjustable floats only);

Begin by removing the float bowl sight plugs located on the sides of both front and rear float bowls as indicated picture #5 below. You may wish to place rags under them as some fuel may spill when the plugs are removed. Make sure the sight plug gaskets do not fall or get lost when the plugs are removed.

Holley Carburetor 2

*AGAIN, HAVE AN APPROCPRIATE FIRE EXTINGUISHER NEARBY WHEN PERFOMRING THESE ADJUSTMENTS*

Start the engine and allow to idle.

Place a 5/8” wrench (box end preferred) over the float adjuster nut, and using a large flat blade screwdriver, barely loosen the set screw on top as shown in picture #6 on the following page.

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