Kohler L600 / L654 — Cylinder Reboring
Repair & overhaul · Cylinder block
For the Kohler L600 / L654, from the Kohler service manual.
Applies to: Kohler L600 engine
Procedure
- Use inside micrometer to measure wear, then select nearest suitable oversize of .010, .020 or .030 inch.
- Use a low speed drill press and rebore at about 600 RPM; lower hone into bore, center and adjust stones in firm contact.
- Diesel fuel oil or kerosene can be applied to stones as a cutting-cooling agent.
- With lower edge of each stone even with lowest edge of bore, start drill and move hone up and down to prevent cutting ridges; check size frequently.
- When bore is within .0025 inch of desired size, replace coarse stones with burnishing stones.
- Continue with burnishing stones until within .0005 inch of desired size, then use finish stones and polish to final size.
- Clean cylinder wall with soap and water, dry thoroughly, then apply a light coat of SAE 10 oil to prevent rust.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Rebore speed about 600 RPM
- Oversizes .010, .020, .030 inch
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.