Kohler — Governed Idle Speed Adjustment
Adjustments · carburetor/governor
From a Kohler service manual covering: CH18, CH20, CH22, CH23, CH25, CH620, CH630, CH640, CH670, CH680, CH730, CH740…. Check it applies to your exact model before use.
Applies to: Kohler CH18, Kohler CH740
Procedure
- Hold governor lever away from carburetor so throttle lever is against idle speed adjustment screw. Start engine and warm up, then adjust screw to approximately 1200 RPM using a tachometer.
- Release governor lever and check throttle lever is in idle position. Turn governed idle adjustment screw to obtain equipment manufacturer's recommended idle speed (1500-1800 RPM).
- Move throttle lever to wide-open/full throttle 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
- 1200 RPM
- 1500-1800 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.