Kohler — INSPECTION AND RECONDITIONING

A Kohler service procedure — check it applies to your exact model before use.

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Procedure

1. 1. Use a micrometer and measure the diameter of
2. the piston, 1/2” above bottom of piston skirt, per-
3. pendicular to the piston pin (see Figure 10-4).
4. 2. Use an inside micrometer, telescoping gauge, or
5. bore gauge and measure the cylinder bore. Take
6. the measurement approximately 2-1/2" below the
7. top of the bore and perpendicular to the piston
8. pin.
9. 3. Piston-to-bore clearance is the difference be-
10. tween the bore and the piston diameter
11. (step 2 minus step 1).

Source: manual:Magnum_M18_and_M20_Service_Manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.