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Home›Repair guides›Generac›Carburetor Final Adjustment

Generac — Carburetor Final Adjustment

Adjustments

From a Generac service manual covering: GN-190, GN-191, GN-320, GN-360. Check it applies to your exact model before use.

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Procedure

  1. Start the engine and allow a sufficient warm-up period.
  2. Hold the throttle lever against the idle speed stop screw, then turn the screw to obtain correct idle speed.
  3. For an AC generator, use an AC frequency meter; correct high no-load speed is 62-63 Hertz (3720-3780 rpm).
  4. For non-generator applications, adjust the high no-load speed stop screw to about 3750 rpm.

Tools required

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Specs & values

  • 62-63 Amazon eBay Hertz (3720-3780 rpm) for generator
  • About 3750 rpm for non-generator units

Source: Generac service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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