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Home›Repair guides›Kohler›Adjust Low Idle Fuel

Kohler — Adjust Low Idle Fuel

Adjustments · Carburetor

From a Kohler service manual covering: CH18, CH20, CH22, CH23, CH25, CH620, CH640, CH670, CH680, CH730, CH740, CH750. Check it applies to your exact model before use.

Applies to: Kohler CH18, Kohler CH740

Before you start

  • Do not attempt to remove limiter caps.

Procedure

  1. Place throttle control into idle or slow position; adjust low idle speed to 1200 RPM.
  2. Turn low idle fuel adjusting needle out (counterclockwise) until engine speed decreases (rich); note position.
  3. Turn needle in (clockwise); note position where speed decreases (lean).
  4. Set adjusting needle midway between rich and lean settings.
  5. Repeat for other low idle adjustment needle on two-barrel carburetor.
  6. Recheck/adjust low idle speed to specified setting.

Specs & values

  • Low idle speed 1200 RPM

Full service-parts list: Kohler CH740 →

Source: Kohler 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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