Kohler — KohlerEngines.com

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

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Procedure

1. Using an abrasive cut-off wheel, cut out a six tooth
2. Grind off any burrs or sharp edges.
3. Invert segment and place it between ignition bosses

Source: manual:Kohler_CH440_-_Engine_Owner_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.