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Float Level (On-Vehicle)

  1. Operate engine until choke is fully open. Install Float Gauge (J-34935-1) in vent slot. See Fig 1 . Allow gauge to float freely. DO NOT press downward on float gauge or float damage may occur.
  2. Observe indicator mark in relation to top of casting. This reading should be within 2/32" of float level specification. See CARBURETOR ADJUSTMENT SPECIFICATIONS table. Excessive fuel pump pressure will cause a high float level.
  3. Remove air horn and adjust float level if not within specification. See FLOAT LEVEL under ADJUSTMENTS in this article.
Fig 1: On-Vehicle Float Level Check
G54283Courtesy of GENERAL MOTORS CORP.
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