Kohler — Low Idle Speed Adjustment
Adjustments · governor
From a Kohler service manual covering: CS10, CS103, CS10S, CS10ST, CS10T, CS12, CS123, CS12GT, CS12S, CS12ST, CS12T, CS4…. Check it applies to your exact model before use.
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Procedure
- With engine warm, move throttle lever clockwise until it stops.
- Check idle speed with tachometer.
- Turn adjustment screw in (clockwise) to increase idle speed.
- Turn adjustment screw out (counterclockwise) to decrease idle speed.
Tools required
- tachometer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Recommended low idle speed 2000 RPM ± 100 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.