Kohler — Adjust Carburetor
Adjustments · Walbro side-draft carburetor
From a Kohler service manual covering: MV16, MV18, MV20. Check it applies to your exact model before use.
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Before you start
- Do not force tapered adjusting needles.
Procedure
- Turn idle fuel adjusting needle in until it bottoms lightly.
- Set preliminary needle settings.
- Start engine and run at half throttle 5-10 minutes.
- Set main fuel needle midway between rich and lean if adjustable.
- Set idle speed to 1200 rpm by turning idle speed screw.
- Set idle fuel needle midway between rich and lean.
- Recheck idle speed with tachometer.
Tools required
- Tachometer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Idle speed 1200 ±75 rpm
- Must not exceed 1500 rpm when setting idle fuel needle
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.