Kohler L600 / L654 — Cylinder Head Service

Maintenance

For the Kohler L600 / L654, from the Kohler service manual.

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Procedure

1. After each 500 hours of operation, take the cylinder head off the engine.
2. Scrape and remove carbon from the combustion chamber using a sharp piece of wood to avoid scratching machined surfaces.
3. Always use new cylinder head gaskets.
4. Make sure head bolts are tightened in the proper sequence to the specified torque.
5. Before reinstalling serviced heads, check and adjust valve-tappet clearance.

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.

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