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Home >> Chevrolet >> 1987 >> Nova Base, 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Carburetor - AISAN 2-Bbl >> Adjustments >> Float Drop
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Float Drop

  1. Invert air horn, gently lift up float and measure clearance between needle valve and float arm. See Fig 1 . Clearance should be .066-.078" (1.67-1.99 mm).
  2. Adjust clearance by bending outer float tab "B". See Fig 2 . Install needle valve clip after completing float adjustments.
Fig 1: Measuring Float Drop
G5156Courtesy of GENERAL MOTORS CORP.
Fig 2: Adjusting Float Drop
G5157Courtesy of GENERAL MOTORS CORP.