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Float Level

  1. Remove air horn. Hold float pin firmly in place. Push down on end of float arm against top of float needle. See Fig 1.
  2. With gasket removed, use a depth or "T" scale to measure distance from top of casting to index point at toe of float.
  3. If adjustment is needed, gently bend float arm up or down. Do not force needle against needle seat. Install new gasket, replace air horn. Start engine and check for leaks.
    Fig 1: Adjusting Float Level
    G09341270Courtesy of GENERAL MOTORS COMPANY
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