Kohler L600 / L654 — Carburetor Adjustment (Gasoline)
Adjustments
For the Kohler L600 / L654, from the Kohler service manual.
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Before you start
- Do not force adjustment needles as this will damage needle or seat.
Procedure
- Stop engine and turn Main Fuel adjustment all the way in (clockwise) until the needle bottoms lightly -- do not force.
- For preliminary adjustment, turn Main Fuel adjustment out (counterclockwise) 2-1/2 turns on side draft or 1-1/2 turns on up draft.
- Start engine and allow it to warm up to normal operating temperature.
- Place engine under normal load for final adjustment.
- Move Main Fuel needle in until engine starts to slow from too lean a mixture (note position).
- Back out until speed increases; continue turning richer until speed again starts to drop, then turn in about halfway between lean and overrich.
Specs & values
- Main fuel 2-1/2 turns open (sidedraft)
- Main fuel 1-1/2 turns open (updraft)
- Idle fuel 2 turns open (sidedraft)
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.