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Home›Repair guides›Kohler›Carburetor Idle Speed Adjustment

Kohler — Carburetor Idle Speed Adjustment

Adjustments

From a Kohler service manual covering: ZT710, ZT720, ZT730, ZT740. Check it applies to your exact model before use.

Applies to: Kohler ZT710, Kohler ZT720, Kohler ZT730, Kohler ZT740

Procedure

  1. Hold governor lever away from carburetor so throttle lever is against idle speed adjustment screw. Start engine and warm up.
  2. Adjust screw to set approximately 1450 RPM. Check speed using tachometer. Turn adjustment screw clockwise to increase or counterclockwise to decrease speed.
  3. Release governor lever and check that throttle lever is in idle position. Obtain equipment manufacturer's recommended idle speed (1750 RPM).
  4. Use pliers to bend tab to achieve recommended speed.
  5. Move throttle lever to wide-open position and hold. Turn high speed screw to obtain intended high speed no-load RPM.

Tools required

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

Specs & values

  • Approximate idle speed 1450 RPM
  • Governed idle speed 1750 RPM
  • Governed idle speed typically 300 RPM higher than low idle speed

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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