Kohler — Carburetor Idle Speed (RPM) Adjustment
Adjustments
From a Kohler service manual covering: KT610, KT620, KT715, KT725, KT730, KT735, KT740, KT745. Check it applies to your exact model before use.
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Procedure
- Hold governor lever away from carburetor so throttle lever is against idle speed (RPM) adjustment screw. Start engine and warm up.
- Adjust screw to set approximately 1450 RPM. Turn adjustment screw (inner) clockwise (in) to increase or counterclockwise (out) to decrease speed.
- Release governor lever and check that throttle lever is in idle position. Obtain equipment manufacturer's recommended idle speed (1750 RPM).
- Use a pliers to bend tab to achieve recommended governed idle speed.
- Move throttle lever to wide-open/full throttle position. 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
- Low idle speed approximately 1450 RPM
- Governed idle speed typically 300 RPM higher than low idle speed
- Maximum engine speed no load 3750 RPM
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.