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Cummins/Onan — The cylinder bore must be deglazed before service

A Cummins/Onan service procedure — check it applies to your exact model before use.

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Procedure

  1. 1. If the cylinder block does not need reboring and
  2. 2. Remove old rings and clean up grooves. Never
  3. 3. Before installing new rings on piston, place top

Source: manual:TP2043 Kohler Engine Service KT17 KT19 KT21 (05-1984).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.