Kohler — Adjust Governed Idle Speed
Adjustments · Governor system
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
Procedure
- Hold governor lever away from carburetor so throttle lever is against idle speed screw.
- Start engine and warm up; adjust screw to approximately 1200 RPM.
- Release governor lever and check throttle lever is in idle position.
- Turn governed idle adjustment screw to obtain equipment manufacturer recommended idle speed (1500-1800 RPM).
- Move throttle lever to wide-open/full throttle and set high speed screw to intended no-load RPM.
Tools required
- Tachometer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Governed idle speed typically 1500-1800 RPM; governed idle about 300 RPM higher than low idle
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.